Strategies to encourage physical activity in patients with hemophilia to improve quality of life

Abstract

Hemophilia is a bleeding disorder caused by a congenital abnormality of blood coagulation. Until the mid-1970s, patients with hemophilia (PWH) were advised to refrain from physical activity (PA) because of a perceived increased risk of bleeding. Since then, PA, which is recognized as being essential for health maintenance, is now recommended by the World Federation of Hemophilia. Moreover, a number of studies reported that PA can improve treatment efficacy and prevent bleeding in PWH. Physical assessment and intervention in PA are currently used in clinical practice. However, the necessity of PA is not emphasized, and many PWH generally have low- to- no PA. Therefore, a behavior change approach to encourage patient motivation is becoming ever more important. In this article, we review articles addressing PA in PWH and discuss strategies to encourage PA through a behavior change approach by focusing on factors relevant to hemophilia, such as benefits and bleeding risk of PA, risk management of bleeding, PA characteristics, and difficulty with exercise adherence. The trust relationship between clinicians and patients, a transtheoretical model of behavior change, and motivation theory as approaches to promote PA are introduced. Finally, we review a case report of the clinical success of a behavior change approach to promote PA. Many PWH find it difficult to continue PA because of aging, fear of bleeding, insufficient recognition of PA benefits, and psychological problems. Therefore, it is essential and important to perform prophylaxis with PWH and to heighten their understanding of the benefits and risks of PA, before initiating the exercise regimen. For those patients who find it difficult to participate in PA, it is necessary to plan individual-based behavior change approach and encourage self-efficacy.

Introduction

Hemophilia

Hemophilia is an inherited X-linked recessive bleeding disorder, which is caused by a deficiency of coagulation factor VIII (hemophilia A) or factor IX (hemophilia B) related to mutations of the clotting factor gene; it mainly affects males and is subcategorized as severe, moderate, or mild. A definitive diagnosis depends on a factor assay to demonstrate the deficiency of FVIII or FIX. Severity classification of hemophilia is based on the factor activity, which is as follows: severe (<1 IU/dL [<0.01 IU/mL] or <1% of normal), moderate (1–5 IU/dL [0.01–0.05 IU/mL] or 1%–5% of normal), and mild (5–40 IU/dL [0.05–0.40 IU/mL] or 5% to <40% of normal).¹ People with severe hemophilia usually bleed frequently into their muscles or joints. Bleeding is often spontaneous, which means it happens for no obvious reason. People with moderate hemophilia bleed less frequently. They may bleed for a long time after a surgery, bad injury, or dental work. A person with moderate hemophilia will rarely experience spontaneous bleeding. People with mild hemophilia usually bleed only as a result of surgery or major injury.¹

Particular joints that have recurrent bleeding are usually referred to as “target joints.” A target joint can progress to synovitis and arthropathy if bleeding is not controlled. Clotting factor replacement therapy is the first-choice treatment for hemophilia. A major complication in hemophilia is hemophilic arthropathy caused by repeated intra-articular bleeding, which accounts for 65%–80% of all bleeding episodes with ~80% predominantly localized to the elbows, ankles, and knees.²

Factor replacement therapy is mainly classified into prophylaxis therapy and episodic “on-demand” therapy. Prophylaxis is the treatment by intravenous injection of a factor concentrate a few times per week to prevent anticipated bleeding. The purpose is to maintain normal musculoskeletal functions by preventing bleeding and joint destruction. The effects have been reported particularly in patients with severe and moderate hemophilia.¹ The prophylaxis protocol is 15–40 IU/kg per dose administered three times a week for those with hemophilia A, and twice a week for those with hemophilia B.¹ Prophylaxis is recommended to prevent complications of joint dysfunction. It was reported that the frequency of intra-articular bleeding and dysfunction of bone and cartilage in boys who underwent prophylaxis were significantly lower than those in boys who underwent on-demand therapy.³ However, some patients have a factor VIII or IX alloantibody inhibitor, which should be considered if there is less than expected factor VIII or IX activity after clotting factor replacement therapy.⁴ A low-responding inhibitor is defined as an inhibitor level that is persistently <5 BU/mL, whereas a high-responding inhibitor is defined by a level ≥5 BU/mL.¹ Patients with a history of a high-responding inhibitor may have joint dysfunction.⁵ Therefore, an assessment of past inhibitor titer is important. Hemostatic treatment for such patients is more difficult and requires a greater dose of coagulation factor or bypassing agents because of inhibition due to neutralization of clotting factors.¹ Patients with a low-responding inhibitor may be treated with specific factor replacement at a much higher dose, if possible, to neutralize the inhibitor with excess factor activity and stop bleeding.¹ On the other hand, bypass therapy using activated prothrombin complex concentrate or recombinant activated factor VII is performed for patients with a high-responding inhibitor.¹

Prophylaxis is advisable prior to engaging in activities with a higher risk of injury. Therefore, prophylaxis or preliminary replacement therapy is essential before physical activity (PA). Preliminary replacement therapy and prophylaxis are sometimes used together depending on the bleeding risk. Prior to PA, prophylaxis is performed based on the coagulation factor activity levels. Adequate levels of clotting factors are required; a level of >5% is standard for a normal level of daily activity, whereas a factor level of >15% is recommended prior to sports activities.⁶ In addition, a factor level of 20%–40% is recommended prior to physiotherapy (PT).⁷ It is recommended to perform PT on the day prophylaxis is performed. The recommended dose prior to PA and PT has not been reported for patients with inhibitors. However, it is recommended to perform PA on the day bypass therapy or neutralization is performed. Therefore, close cooperation with pediatricians and physicians and a check on the coagulation system test values are essential.

Need for PA in patients with hemophilia

Until the mid-1970s, patients with hemophilia (PWH) were advised to refrain from PA because of a perceived increased risk of bleeding.^2,8,9 However, such recommendations may lead to physical dysfunction and obesity among PWH.^10–12 Since then, PA, which is recognized as being essential for health maintenance,^2,8,13 is now recommended by the World Federation of Hemophilia.¹ Many studies reported that PA can improve treatment efficacy and prevent bleeding in PWH.^2,8,14 Young PWH are now able to enjoy PA in daily life without restriction.² Furthermore, PWH often survive to an advanced age.^15–17 For elderly PWH, physical inactivity may increase the risk of diabetes, hypertension, hyperlipidemia, obesity, and osteoporosis and related fractures, in addition to hemophilia-related complications.

Need for behavior change approach

It is reported that 50% of the general population discontinued participation in PA regimens based on the traditional scientific approaches to achieve fitness after 3–6 months.¹⁸ Therefore, the effectiveness of behavior change approaches to continue and encourage PA has been investigated. The behavior change approach is an interventional method to identify factors related to PA based on behavior science theory with the aim to realize a physically active lifestyle. Therefore, we conducted a literature review of articles addressing PA in PWH and discuss strategies to encourage PA through a behavior change approach by focusing on factors relevant to hemophilia, such as benefits and bleeding risk of PA, risk management of bleeding, PA characteristics, and difficulty with exercise adherence.

PA and hemophilia

General benefits of PA

According to the “Global Recommendations on PA for Health” by the World Health Organization (WHO), physical inactivity is the fourth leading risk factor for mortality, accounting for 6% of deaths globally, following hypertension (13%), smoking (9%), and high blood glucose (6%).¹⁹ Health problems associated with physical inactivity are more severe for PWH than the general population. Furthermore, obesity is linked to an increased risk of cardiovascular disease and chronic arthropathy, which promotes intra-articular bleeding and the risk of fracture.^12,14,15,20 In addition, musculoskeletal disorders caused by hemophilic arthropathy and aging are risk factors for falling injuries.¹⁵ Thus, promotion of PA is especially important for PWH to reduce the risk of falling injuries and lifestyle-related diseases.

PA in PWH

Bleeding risk of PA in PWH

PA level has been positively correlated with bleeding risk among patients with severe and moderate hemophilia.^17,21 In addition, significant differences were found in the prevalence of bleeding events, as those who exercised strenuously were more likely to incur bleeds due to trauma,²² and 55% of PWH actively engaged in sports reported bleeding episodes associated with PA.²³ On the other hand, there was no significant correlation between PA level and bleeding frequency of target joints or joint function,^9,22,24 suggesting that the risk of bleeding is dependent on bleeding history, hemostatic control, and sport participation.¹⁴ Therefore, administration of coagulation factor as a prophylactic or replacement therapy is essential for PWH before PA to prevent an increased risk from the level of PA.

Features of PA in PWH

The WHO recommends moderate PA of at least 60 minutes per day for children and adolescents aged 5–17 years, and moderate aerobic PA for at least 150 minutes per week or intensive aerobic PA for at least 75 minutes per week for adults aged 18–64 years.¹⁹ These recommendations can also be applied to people with disabilities. However, health care providers should consider the level of disability, exercise ability, specific complication risk, and limitations associated with disease; accordingly adjust the type, load, and total duration of PA; and supervise patients individually.¹⁹

As shown in Table 1,^{10,11,17,21–31} many previous studies have reported that PWH have the same or a lower degree of PA in comparison to healthy controls.^{10,11,20,22,23,25,28,32} One study states that more than half of patients with severe and moderate hemophilia do not perform recommended levels of PA.²¹ It is also reported that PWH spent more time in sedentary behavior^21,23,30,31; even subjects with no arthropathy had muscle weakness,² and 60% managed hemophilia by avoiding PA.³³ In addition, in developing countries where prophylaxis is not performed, the sports participation remains poor.^25,34 On the other hand, some studies found a higher level of PA in PWH than in healthy individuals.^17,24,28 PA can be measured in two ways – self-reporting and activity monitoring.³⁵ The former is widely used because it is simple and low cost, whereas the latter has possibilities for goal setting and quantified monitoring^30,35 (Table 1).

Table 1.

Summary of previous research about PA in PWH

References	Journal	Year	PWH group		Control group		Method	Results
			N	Average age, years (SD; range)	N	Average age, years (SD; range)
Falk et al10	Med Sci Sports Exerc	2000	30	12.0 (3.17)	16	11.9 (2.8)	Godin Leisure-Time Exercise Questionnaire	PA level of the PWH group was significantly lower than that of the control group Activity scores 31.8±22.7 (control group 83.4±64.6) Strenuous PA (times/wk) 1.38±2.06 (control group 6.31±5.38)
Tlacuilo-Parra25	Br J Haematol	2008	62	9.02 (3.7)	62	9.30 (3.7)	Validated questionnaire	Sedentary PA 33% (control group 11%) Low-level PA 44% (control group 40%) Moderate-level PA 23% (control group 38%) Intense-level PA 0% (control group 11%) PA level of the PWH group was significantly lower than that of the control group
Engelbert et al11	J Pediatr	2008	34	12.9 (3.2; 8.2–17.4)	–	–	Modifiable Activity Questionnaire	No significant differences for PA in the severity of hemophilia were found A substantial proportion of PWH were overweight, without showing a reduction in PA PA of total patients 57.5 (MET-hours/wk) (38.1; 5.8–181.3; n=34) PA of patients with mild hemophilia 53.5 (MET-hours/wk) (23.8; 15.0–91.9; n=16) PA of patients with moderate hemophilia 65.4 (MET-hours/wk) (19.5; 50.3–94.0; n=4) PA of patients with severe hemophilia 59.9 (MET-h/wk) (54.0; 5.8–181.3; n=14)
Tiktinsky et al22	Haemophilia	2009	44	18 (4; 12–25)	–	–	G&S questionnaire	Strenuous PA (units) 5.0±6.9 Moderate PA (units) 4.5±6.9 Mild PA (units) 3.0±4.3 Total PA (units) 12.6±10.8 G&S total score 77.9±80.2 Moderate correlation was found between PA and age (R=−0.45, P<0.002) Significant difference in the cause of bleeds was found: those who exercised strenuously showed higher proportion of bleeds due to traumatic reasons (P<0.01) 25 participants (56.8%) performed strenuous PA at least once a week
Buxbaum et al26	Haemophilia	2010	17	13.71 (2.1;11–18)	44	13.28 (2.0; 10–16.5)	Activity monitor (biaxial accelerometer [ActiTrac; IM Systems, Baltimore, MD, USA])	PA level (low and moderate) of the PWH group was significantly higher than that of the control group Low-level PA 70.24% (SD, 7.1) (control group 75.02% [SD, 6.0]) (P=0.010) Moderate-level PA 18.35% (SD, 3.4) (control group 15.89% [SD, 3.3]) (P=0.012) High-level PA 11.44% (SD, 6.3) (control group 9.13% [SD, 3.8]) (P=0.086) Vigorous PA 1.96% (SD, 2.6) (control group 1.54% [SD, 1.4]) (P=0.409)
Fearn et al27	Haemophilia	2010	20	39.4 (33.7–45.1)	20	40.3 (34.3–46.3)	The HAP	Adjusted activity score by the HAP 66.15 (59.38–72.92) (control group 87.10 [84.14–90.06]) PA level of the PWH group was significantly lower than that of the control group
Sherlock et al23	Haemophilia	2010	61	38 (16–63)	–	–	IPAQ	High-level PA: 28 patients (45.9%) Moderate-level PA: 17 patients (27.9%) Low-level PA: ten patients (16.4%) Moderate PA (minutes) 152.7±167.2 (European average 318.7±115.5) Vigorous PA (minutes) 141.1±145.6 (European average 281.7±631.15) Walking (minutes) 444.0±156.5 (European average 600±878.3) Sitting (minutes) 2,262.0±1,326.8 (European average 2,033.0±1,115.7) Total MET (minutes) 4,319.7±3,491.2 (European average 6,505.9±7,332.54)
González et al17	Haemophilia	2011	41	12.78 (8–18)	25	15.90 (8–18)	Activity monitor (triaxial A digraph) GT3X accelerometer (ActiGraph LLC, Fort Walton Beach, FL; USA)	PA (light, moderate, and moderate to vigorous) of PWH was higher than their healthy counterparts Healthy participants spent more time in sedentary behaviors than PWH Sedentary behavior (minutes/d) 356.78 (16.6) (control group 479.41 [19.62]) (P<0.007) Light PA (minutes/d) 450.24 (18.68) (control group 339.63 [19.93]) (P<0.007) Moderate PA (minutes/d) 8.48 (1.15) (control group 3.36 [0.86]) (P<0.007) Vigorous PA (minutes/d) 0.25 (0.06) (control group 0.41 [0.10]) Moderate-to-vigorous PA (minutes/d) 8.74 (1.19) (control group 3.77 [0.88]) (P<0.007)
Groen et al28	Haemophilia	2011	47	12.5 (2.9)	–	–	Modifiable Activity Questionnaire	PA levels were similar across PWH and comparable with the general population Total PA time (hours/wk) severe 8.7±3.8; non-severe 8.6±7.8 PA (MET-hours/wk) severe 54.9±30.3; non-severe 55.6±53.4) Vigorous PA (hours/wk) severe 6.2±4.2; non-severe 5.4±6.3
Khawaji et al29	Blood Coagul Fibrinolysis	2011	34	Group A: 27.1 (1–2; 19–35); group B: 44.1 (2.1; 33–56)	Group A: 20; group B: 42	Group A: 29.9 (1–0); group B: 43.0 (1.1)	Modifiable Activity Questionnaire	Group A: patients who started prophylaxis at the age of ≤3 years Group B: patients who started prophylaxis at the age of >3 years The age in group A was lower than that in group B (P<0.001) Total joint score in group A was lower than group B (P<0.001) Vigorous activity (MET-hours/wk): group A: 4.76 (1.59); group B: 0.57 (0.37) Leisure activity (MET-hours/wk): group A: 21.15 (3.19); group B: 8.45 (2.35) Total activity (MET-hours/wk): group A: 25.24 (3.59); group B: 9. 05 (2.41) PA (vigorous, leisure, and total) in group A was higher than group B PA (vigorous, leisure, and total) in group B was higher than the control group
Czepa et al24	Haemophilia	2012	48	44(11)	43	42(11)	Five-point Likert scale	PA level of PWH group was significantly higher than that of the control group Activity level (times/wk) 1.3±1.3 (0.0–4.0) Control group 0.7±0.9 (0.0–3.0)
Broderick et al21	Haemophilia	2013	104	9.5 (4–18)	–	–	Modifiable Activity Questionnaire	Leisure-time PA: all boys: 7.9 hours/wk; boys >10 years; 8.5 hours/wk Vigorous PA (>6 METs); all boys: 3.8 hours/wk; boys >10 years of age: 4.5 hours/wk Moderate and vigorous PA (>3 METs); all boys: 6.4 hours/wk; boys >10 years; 6.8 hours/wk
Goto et al30	Haemophilia	2014	32	42.5 (9.5; 26–61)	–	–	Activity monitor (triaxial accelerometer [HJA-350IT; Omron Co., Ltd, Kyoto, Japan])	PA for locomotive activities (MET-hours/wk) 12.8 PA for non-locomotive activities (MET-hours/wk) 3.7 Total PA (MET-hours/wk) 16.5
Goto et al31	J Jap Prim Care Assoc	2014	22	37.2 (10.4)	–	–	Activity monitor (triaxial accelerometer [HJA-350IT; Omron Co., Ltd])	No subject reached recommended PA, and all were physically inactive PA for locomotive activities (MET-hours/wk) 7.0 PA for non-locomotive activities (MET-hours/wk)2.8 Total PA (MET-hours/wk) 9.8

Notes: Previous research has investigated PA using a variety of methods, and characteristics of the subjects were different in these studies. PA can be measured in two ways – self-reporting and activity monitoring.²⁹ The former is widely used, because it is simple and low cost, whereas the latter has possibilities for goal setting and quantified monitoring. We focused on four studies that used an activity monitor. Studies by Buxbaum et al²⁶ and González et al¹⁷ showed that PA of PWH was higher than that of the control group. On the other hand, two studies by Goto et al³⁰,³¹ showed physical inactivity in PWH. However, regarding the subjects of research by Buxbaum et al, half of the number of subjects had severe hemophilia, average age was 13.71 years, and status of arthropathy was unknown. In addition, regarding the subjects of research by González et al, almost all the subjects had mild hemophilia, average age was 12.78 years, and status of arthropathy was 1.09–3.83 using the Gilbert score.⁷⁰ On the other hand, regarding the subjects of research by Goto et al, almost all the subjects had severe hemophilia, average age was 42.5 years and 37.2 years, and almost all had severe arthropathy. Therefore, the comparison of PA for PWH based on previous research is difficult at present.

Abbreviations: G&S, Godin and Shephard; HAP, human activity profile; IPAQ, International Physical Activity Questionnaire; MET, metabolic equivalent; N, number; PA, physical activity; PWH, patients with hemophilia; SD, standard deviation.

Among the 14 studies listed in Table 1, ten were surveys of responses to questionnaires with three using the Modifiable Activity Questionnaire. Four of the surveys used activity monitoring with two using the Active Style Pro HJA-350IT. Those studies showed that PA in PWH was inversely correlated with age and positively correlated with muscle strength.^8,10,22,23 In addition, PWH with the following characteristics were considered to have a low activity: those who started prophylaxis at the age of ≥3 years,²⁹ had impairment,⁹ had a poor bone mineral density of lumbar spine,²⁵ and were obese or overweight.³⁶

Risk management for safe PA

There is a possibility that PA may increase the risk of bleeding. Therefore, risk management for trauma and bleeding is necessary for PWH to participate in PA. PWH should receive appropriate prophylactic administration of coagulation factors to reduce the risk of bleeding while participating in sports,²³ achieve good physical condition to undertake PA, have knowledge about first aid and PA, and choose the appropriate type of sports.³⁷ Therefore, besides the administration of coagulation factors, other factors are necessary for ensuring safety of PWH during PA.

Prophylactic treatment should be tailored to the bleeding pattern and lifestyle of individual patients⁶ and to ensure adequate levels of clotting factors before participating in PA.^23,37,38 Vigilant physical and orthopedic examinations in addition to making adjustments for various physical factors (eg, muscle strength, flexibility, durability, balance, coordination, and body fat content) are particularly important to avoid injury to target joints.^{6,14,32,37,39} Selection of appropriate sports must be reached based on the individual’s physical ability and past history by consultation with a hemophilia care physician, orthopedic surgeon, rehabilitation doctor, physiotherapist, patients, and parents.^2,8 In particular, physiotherapists play an important role in the selection of appropriate PA.

After a bleeding event, PWH should resume activities gradually to minimize the chance of a re-bleed.^14,40 Therefore, physiotherapists should encourage the recovery of physical function after bleeding by individualized assessment and appropriate rehabilitation.¹⁴ In addition, it is necessary to recognize the risk of bleeding and participation in certain sports. Low-risk sports include noncontact sports, such as swimming, walking, and bicycling, while high-risk sports include those involving contact or collision, such as martial arts.¹

When participating in sports, PWH should learn the rules and be familiar with current technologies, perform warm-up exercises, wear appropriate equipment, and notify coaches and fellow participants of their conditions.^14,32,39 Evidently, no sport is 100% safe.^2,23 Immediately after a bleeding event, adequate replacement therapy and RICE (rest, ice, compression, elevation) are necessary.^14,32 For PWH receiving inhibitor therapy, it is necessary to determine appropriate exercises for individuals and to monitor response to exercise based on careful assessment by the physiotherapist.^39,41 In particular, it is necessary to carefully choose an exercise program for patients with high-titer inhibitors (>5 BU/mL) as the hemostatic response to bypass agents is less reliable.⁹

Benefits to PWH from PA

PA confers several musculoskeletal benefits to PWH, such as improved muscle strength and joint stability,^8,38,39,42 reduced joint pain,^8,38 increased bone density and protection of joints,^8,19,32,40 prevention from falling,⁴⁰ lower bleeding risk,^8,39 and improved joint flexibility.^10–12,42 Other physical benefits include prevention of obesity,¹⁶ heart disease,¹³ hypertension,^13,32 and diabetes^13,32 and promotion of neuromuscular development.¹ PA also confers several benefits to mental health, such as improvement in depression,³² self-steem,^1,6,8 social interactions,^2,6,8 self-efficacy,²⁶ happiness,¹³ emotional status,^2,8 social acceptance perception,⁸ positive self-assessment,⁸ and reduction of anxiety.^6,8,13,26,38 Continuous PA, rather than the type of exercise, is an important determinant of health-related quality of life, even for PWH.^8,9,40,43 In particular, children achieve the greatest improvements in health-related quality of life by sports participation.⁹

It has also been reported that PA increased endogenous factor VIII activity (10 minutes after the maximal exercise test) in patients with mild-to-moderate hemophilia.⁴⁴ Therefore, PA can confer many benefits to PWH in developing countries with limited access to pharmacologic treatments.^26,34

Difficulty of exercise adherence

A German study reported that 79% of adolescents and 81.5% of adults with hemophilia considered daily exercise to be important.⁴⁵ However, many patients report limited PA, primarily because of fear of increased bleeding frequency, overprotection by parents, and the belief that joint disease cannot be prevented (reported by 36% of adolescent respondents).^{14,33,34,38,46} On the other hand, only 31% of the respondents reported seeking treatment within 1 hour of a bleeding episode.³³ We believe that education of patients and their families is important for hemostatic therapy and essential for first aid.

Mental aspects of PWH are reported as follows: overprotection by family³⁸; anxiety³⁸; and decrease in self-esteem, self-efficacy, self-acceptance,^26,30,38 exercise adherence,⁴⁷ and treatment compliance.⁶ In addition, some boys with hemophilia in one study regretted the fact that their doctors or parents did not allow them to participate in sports of their choosing.⁴⁶ Therefore, many patients must be motivated to engage in PA,⁴⁸ suggesting the need for a behavior change approach.

Behavior change theory and techniques

For this section, it was assumed that PA was carried out under the suitable management of hemostasis. Therefore, education regarding hemostasis is very important.

Building trusting relationships

Thom and Campbell⁴⁹ identified factors influencing the relationship of trust between the patient and clinician, and thoroughly evaluating problems, understanding patient’s individual experience, expressing care, providing appropriate and effective treatment, communicating clearly and completely, building partnership/sharing power, and demonstrating honesty/respect for patient. Therefore, a knowledgeable clinician who focuses only on medical conditions of patients, would not be able to build their sufficient trust.

Motivation theory

Motivation theory involves promotion of PA by increasing self-determination; in the self-determination theory, motivation is classified as 1) amotivation (the absence of motivation itself), 2) extrinsic motivation (means of PA are other objectives), or 3) intrinsic motivation (PA itself has become a goal)⁵⁰ (Table 2).

Table 2.

Classification of exercise motivation based on self-determination theory

1.	Intrinsic motivation example: Because there is fun in exercise itself
2.	Integrated regulation example: Because my exercise is my top priority
3.	Identified regulation example: Because I think exercise is important for me
4.	Introjected regulation example: Because guilt occurs if I do not exercise
5.	External regulation example: Because the doctor told me that I should exercise
6.	Amotivation example: Reason for lack of exercise is unknown

Note: Motivation is listed in the order in which it is possible to exercise continuously.

Intrinsic motivation is considered the highest motivation of self-determination, while extrinsic motivation is classified as 1) external regulation (motivation by external factors, such as rewards and recommendations from others), 2) introjected regulation (motivation from obligation to PA), 3) identified regulation (motivation from the emotional need for PA), and 4) integrated regulation (motivation consistent with its own values).⁵¹ In addition, it is assumed that the degree of self-determination is high in the aforementioned order, and it has been confirmed that PA is strongly related to increasing the degree of self-determination by observational studies and interventional studies.⁵¹

Intrinsic motivation for promoting PA and exercise 1) emphasizes the individual, 2) promotes perceptions of choice, 3) promotes the intrinsic fun and excitement of exercise, and 4) promotes a sense of purpose by teaching the benefits of PA to health, optimal function, and quality of life, but it does not 1) overemphasize peer comparisons of performance, 2) undermine intrinsic focus by misusing extrinsic rewards, 3) turn exercise into a chore or render it boring, or 4) create amotivation through dissemination of inaccurate fitness information.⁵²

There are many reasons for patients to discontinue PA. Therefore, exercise prescription should encourage self-motivation to perform PA.

Self-efficacy

Improvement of self-efficacy is important to foster behavior changes.⁵³ In PA, self-efficacy is important to build confidence and encourage the individual to perform specific PA in particular environments.⁵³ Self-efficacy is the most interesting concept as specified factors and intervention targets for PA and is one of the most influential psychological factors in promotion of PA.⁵⁴ In addition, rehabilitation is promoted by improvement of self-efficacy.^30,55

Methods to improve self-efficacy are presented in Table 3.⁵⁶ The following factors were found to be important to improve self-efficacy: 1) enactive attainment, 2) vicarious experience, 3) verbal persuasion, and 4) physiological state or emotional arousal.⁵⁶ Behavior modification can also improve self-efficacy⁵⁷ (Table 3).

Table 3.

Source of self-efficacy information

1.	Enactive attainment (eg, discuss challenges depending on the ability and successful experiences of the patients)
2.	Vicarious experience (eg, share successful experiences with patients who have same abilities or problems)
3.	Verbal persuasion (eg, physician praises the successful experience of the patient)
4.	Physiological states or emotional arousal (eg, awareness of improvement in physical function to the patient by comparing previous and present PA levels)

Abbreviation: PA, physical activity.

Transtheoretical model

In the early 1980s, transtheoretical model (TTM) was first proposed as an intervention method based on the degree of patient motivation and has since been widely clinically applied to study various health behaviors.^57–60 There are five stages in behavior (lifestyle) changes: 1) pre-contemplation, 2) contemplation, 3) preparation, 4) action, and 5) maintenance.^58–60

Behavior change approach

The purpose of the promotion theory of PA is to promote independent participation in exercise, as supervised exercise should be limited to the early stages of an exercise regimen.⁵⁷ It is possible to increase PA levels of sedentary individuals and short-term (3–12 weeks) increases in PA are relatively easy to achieve.⁵⁷ However, long-term change (6–24 months) is much more difficult to achieve.⁵⁷ Methods to change behaviors and promote adherence to PA include: 1) TTM, 2) relapse prevention, 3) motivational counseling, and 4) self-monitoring.

In TTM, intervention matched to ability is necessary in order to proceed to the next stage of behavior change.^59,61 Intervention in the pre-contemplation stage should focus on communication with the patient to elucidate the patient’s individual interests. There is no effect on persuasion because during this phase, patients do not recognize the associations between PA and their own health problems. Intervention for contemplation should explore the benefits of PA and disadvantages of physical inactivity. For some, this method is not effective, thus the conviction–confidence model should be employed.⁶² In this model, the clinician assesses the patient’s readiness for behavior change within two dimensions: confidence and conviction. An intervention to increase the patient’s confidence, conviction, or both, can then be applied with the goal of helping the patient (Table 4).

Table 4.

Information necessary for adaptation to the behavior change stage based on the transtheoretical model

Stage	Definition	Characteristics of patient	Goal	Strategies to support change	Inappropriate approach
Pre-contemplation	No intention of changing behavior in the near future, usually at the next 6 months	Not exercising at recommended level No intention to exercise May verbalize an inability to exercise or sustain exercise based on prior unsuccessful attempts May be uninformed or under-informed about the consequences of inactivity in terms of functional activity initiated at any point in the life cycle Tend to avoid reading, talking, or thinking about their inactivity View that the cons outweigh the pros	Increase awareness about the need to change	Encourage thinking about change Discuss feelings and perceptions of exercise/lack of exercise behavior –What in their life contributes to it? What meaning does activity/inactivity have for the patient/family? Give personalized feedback about the risk of the current behavior (loss of muscle strength, endurance, flexibility resulting in decreased functional ability) Personalize information about the benefits of initiating an exercise program beginning as an older adult Dialog about how inactivity affects role implementation, social activities	Intrusive behavior Unilaterally provide knowledge Persuade or argumentative discussion
Contemplation	Intention of changing behavior within the next 6 months	Seriously contemplating exercising/physical activity change in the next 6 months but not within the next month More aware of the pros of changing, but the cons still outweigh the pros, resulting in difficulty progressing to next stage May verbalize an understanding of the need for exercise but does not have the energy or readiness to change the behavior May verbalize: “I know I should, but I can’t now”	Motivate and increase confidence for the ability to change	Help patient set realistic expectations reinforced by small success Identity questions about exercising and continue to provide education about personal risks and benefits Decrease the barriers to exercise Encourage reflection on the ways inactivity affects their life Point out people who included regular exercise in their lives Help to make a definite commitment to change	Criticize or condemn the patient for failure to achieve behavior change Ignore benefits so that the patient continues with a sedentary lifestyle
Preparation	Intention of changing behavior within the next month	Intend to exercise in the near future (within the next 30 days) Pros grow stronger and outweigh cons Has more confidence that they can successfully exercise	Negotiate a plan for exercise	Create a new self-image as an exerciser Make a public commitment to exercise Identity alternatives for exercise and make a plan Facilitate involving supportive others Encourage a component of behavior change where they can experience success	Underestimate the ability of patient who does not reach the desired level of behavior change Creates many problems
Action	Lifestyle modifications for <6 months	The individual has made changes in activity and exercise level within the past 6 months and is meeting recommended exercise levels Relapses are frequent	Reaffirm commitment to exercise and implement plan	Frequent positive reinforcement with rewards for exercising regularly Initiate walking clubs Mobilization of social supporters to participate with the process Introduce additional exercise as an alternative Check off each time you exercise	Make the patient feel relieved by behavior change to the desired level Provide problems one after another
Maintenance	Exercising regularly and has done so for >6 months	Characteristics of patient Exercising regularly for >6 months Exercise has become an established pattern Increasingly more confident that he/she can continue to sustain activity	Problem-solve to prevent relapse	Plan for resisting temptations to skip exercise sessions Join support groups or have exercise buddies	Scold or blame the patient for physical limitations

Problems with PA faced by patients can be classified into four groups according to the confidence and conviction model. The easiest way to assess a patient’s conviction and confidence levels is to ask the patient to rate it on a visual analog scale of 1–10. Patients who think that PA is not important and have no confidence in PA should be provided information in the pre-contemplation stage. It can be difficult to achieve behavior change in patients who have confidence in PA, but do not think that it is important. Hence, these patients should receive counseling from the clinician. Building a trusting relationship is important to present the benefits of PA to the patient. Hence, the clinician should explore discrepancies between physical inactivity and important events in the patient’s life (eg, family and health) and should indicate the magnitude of the benefits of PA.

Strong resistance from a patient should be addressed in the long term while maintaining a trusting relationship during the pre-contemplation stage. Providing individualized information to match important events in the patient’s life (eg, a friend’s illness or birth of a grandchild) to stress the importance of PA is necessary for such patients.

Patients who think PA is important, but do not have confidence in performing PA should be encouraged to enhance self-efficacy, while paying attention to past successful experiences after the importance of PA is emphasized. Such patients should receive added support to realize short-term goals. In addition, intervention and preparation should be encouraged to support the decision to begin PA.

The determination of the patients themselves through discussions of both short- and long-term goals is important. Intervention should also consider the possibility of relapse, a phenomenon in which the patient reverts to the stage before the behavior change, despite entering the action and maintenance stage. In these cases, confirmation and praise of the beneficial results brought about by behavior change are important to encourage continued participation in PA.

Interventions for maintenance should be implemented to prevent relapse. It is necessary to consider the influence of personal problems on the patient’s willingness to participate in PA (eg, when the patient does not want to exercise) through discussion. Implementation of viable measures to prevent relapse proposed by the patient is both important and effective. Regarding relapse measures, reversion to the pre-contemplation or contemplation stage indicates that the patient does not fully recognize the importance of exercise. Therefore, before progressing to the next stage, intervention may be necessary to provide further information about the benefits of PA. Reversion to the preparation stage is caused by a lack of self-confidence, which is intended to overcome situations, in which the patient does not want to perform exercise (eg, during vacation or bad weather). In such cases, clarification of these barriers and discussion of future plans are necessary.

Self-monitoring enables self-strengthening and objective self-evaluation by observing and/or recording self-behavior⁶³ and is an effective method to achieve behavior change for patients with PWH,³⁰ hypertension,⁶⁴ obesity,⁶³ smoking,⁶⁵ diabetes,⁶⁶ and ischemic heart disease.⁶⁷ Process and outcome assessments are important to promote exercise adherence.³⁵ Feedback on exercise results will contribute to exercise adherence.³⁵ Process assessment focuses on frequency of exercise, improving knowledge, response rate, and submission rate of challenges (reporting rates). In outcome assessment, psychological indicators in addition to physical indicators (number of steps, PA, physical fitness, and body weight, etc) are useful to promote exercise adherence.

Motivational counseling, as proposed by Miller and Roll-nick, is a technique commonly employed to achieve behavior change by inducing patient motivation, rather than clinician direction.⁶⁸ Honoring patient autonomy can also increase self-confidence for behavior change and also encourage motivation. The method has four guiding principles: 1) to resist the righting reflex, 2) to understand and explore patient motivation, 3) to listen with empathy, and 4) to empower the patient by offering hope and optimism.⁶⁸

Considerations when introducing a behavior change approach

Behavior change stage and self-monitoring intervention in PWH

As mentioned earlier, many PWH will find it difficult to maintain participation in PA for various reasons, such as fear of bleeding. To address this issue, stages in TTM (ie, pre-contemplation, contemplation, preparation, and maintenance) were evaluated in 15 (46.9%), five (15.6%), six (18.8%), and three (9.4%) PWH, respectively.³⁰ After diagnostic images and physical function were assessed, individual home exercise was instructed. In addition, we conducted randomized controlled trials of self-monitoring.³⁰ Subjects included 32 male outpatients aged 26–64 years who were randomly allocated to self-monitoring (n=16) and control (n=16) groups. Patients in both groups received home exercise guidance and an activity monitor, and those in the self-monitoring group were given a self-monitoring approach. Patients in the self-monitoring group were equipped with a feedback system via the Internet and mobile phone. The self-monitored items included bleeding history, injection of coagulation factor, PA, and frequency of home exercise. In addition, the patients in the control group were not required to report their home exercise status during the intervention period. Most patients (90.3%) self-reported bleeding episodes and frequency of home exercises/PA. Among all patients examined, no change in pain or bleeding frequency was noted by intervention for 8 weeks. However, exercise adherence, self-efficacy, and strength of knee extension significantly improved in the self-monitoring group compared with the control group.

Self-monitoring in our study was designed so that the subjects had access to a server and received feedback results of exercise (eg, the number of times the patient performed the exercise and PA, blooding frequency, and injection of the coagulation factor) with the passage of time shown in graphs and tables after the input of the monitored items. Self-strengthening and objective self-evaluation were facilitated by self-monitoring.⁵⁴ Specifically, the patients were instructed to report bleeding events and the quantified PA using an activity monitor to encourage consideration of possible associations. Positive feedback was achieved once the patient realized that bleeding was not necessarily associated with PA. It is considered that self-monitoring enabled the patients to appreciate the benefits of controlling self-behavior through the recognition of motion results, creating self-efficacy, and improving exercise adherence. It is reported that self-efficacy is strengthened by self-monitoring. For these reasons, self-efficacy is considered to contribute to exercise adherence. In this study, 84.4% of patients had severe hemophilia, more than half had severe arthropathy of the knee joints, and the average patient age was 42.8 years. Therefore, these results illustrate the beneficial effects of self-monitoring by patients exhibiting some factors that inhibit PA, in accordance with the results of previous studies. Hence, a randomized controlled trial focusing on the influence of self-monitoring identified in this study is warranted. If intervention was conducted for a greater number of subjects, it will be possible to further examine the influence of SM according to the motivation and stage of TTM.

Case report

We report the case of a 16-year-old boy with severe hemophilia A, severe arthropathy in both knee joints (Arnold–Hilgartner stage V),⁶⁹ and a history of inhibitor who achieved remarkable improvements in the activities of daily living and PA using PT and self-monitoring intervention. Written informed consent for publication of this case report was obtained from the patient and his family. Therefore, ethical approval was not sought from the committee of research ethics from the Graduate School of Medicine, The University of Tokyo. High inhibitor titers were noted shortly after birth. Immune tolerance induction was initiated when he was 2 years old. However, repeated intra-articular bleeding in both knee joints was accompanied with synovitis. Therefore, he lost the ability to walk at the age of 6 years. PT was commenced at the age of 8 years.

He presented with flexion contractures in both knee joints (−90/−65°) and both hip joints (−30/−30°) and whole-body muscle weakness caused by arthropathy, disability, and physical inactivity. Manual muscle testing of the trunk, hip extensor, hip abductor, knee extensor, knee flexor, ankle extensor, and ankle flexor was evaluated as fair, fair/fair+, fair/fair+, poor−/poor, good/good, good/good, and poor+/poor+, respectively. Stage of TTM was preparation and motivation was amotivation. In addition, because standing and walking were difficult, he was unable to perform most of the home exercises.

Mild load and play exercises were commenced because of a bleeding risk due to inhibitors. Aggressive PA could not be performed. However, when PT became constant, his motivation was improved to external regulation. With increasing age, motivation was changed to identified regulation. Furthermore, intrinsic motivation was also added with the improvement of physical function and inhibitor eradication by the effect of continued immune tolerance induction when he was 12 years old. At that time, he was able to walk with the assistance of two crutches. However, prolonged physical inactivity remained an obstacle to achieving long distances. Therefore, we introduced a self-monitoring method using an activity monitor in addition to home exercise. At that time, the patient was prompted to periodically set specific goals, such as a distance of continuous gait after 1 year.

After introduction of self-monitoring, the attending physician and physiotherapist periodically confirmed the self-monitoring results. In addition, the patient received feedback from physical function assessment results. He and his family received praise, advice, and suggestions based on these results. We regularly reviewed the status of goal achievement and made changes to the home exercise routine and goals as necessary.

After 15 months of self-monitoring, the number of steps increased from ~200 per day to ~5,000 per day, and self-efficacy also improved. In addition, flexion contractures in both knee joints (−30/−10°) and both hip joints (−10/10°) had improved. The results of the manual muscle testing of the trunk, hip extensor, hip abductor, knee extensor, knee flexor, ankle extensor, and ankle flexor improved to good, good/good, good/good, poor−/poor+, normal/normal, normal/normal, and good/good, respectively. Activities range was expanded to the use of public transportation, and the TTM stage improved to action (Figure 1).

Figure 1.

Step count after 15 months of self-monitoring intervention for PWH.

Abbreviation: PWH, patients with hemophilia.

In this case, self-monitoring was effective by introduction at a time when motivation changed to intrinsic motivation. In future studies, barriers to PA due to the time required for academic and university preparation as a possible cause of relapse should be considered. Thus, even patients with severe hemophilia having a history of inhibitors, severe arthropathy, and physical dysfunction can improve PA.

In conclusion, selection of PT programs based on coagulation laboratory data and physical function assessment, intervention based on TTM and motivational theory, and introduction of self-monitoring upon improved self-efficacy were found to be useful interventions.

Considerations in behavior change approach

The purpose of this review was to discuss changes in exercise behavior, rather than to present exercise programs suitable for PWH; thus, no specific exercise guidelines were included. As a limitation of this theory, comparatively few studies have evaluated the use of this model across behaviors among PWH. Further research in this area is much needed. In addition, one of the criticisms of TTM has been its limited usefulness among diverse ethnic groups and low socioeconomic backgrounds.⁶⁸ In particular, behavior change approaches for PWH with arthropathy and inhibitors can complement the effects of PT and exercise guidance. Therefore, it is important to prescribe individualized exercise regimens based on the assessment of hemorrhagic tendency, bleeding history, prophylactic treatment, arthropathy, and physical function.

Conclusion

Many PWH find it difficult to continue PA because of aging, fear of bleeding, insufficient recognition of the benefits of PA, and psychological problems. Therefore, it is necessary to administer prophylactic and replacement therapies before the patient participates in an exercise program. In addition, the benefits and risks of participating in sports should be carefully explained. For patients who find it difficult to participate in PA, it is necessary to plan individual behavior change approaches and encourage improvement in self-efficacy.