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. 2012 Aug 15;2012(8):CD008465. doi: 10.1002/14651858.CD008465.pub2

Yang 2011.

Study characteristics
Methods Study design: RCT
Number randomized: 44; 19 to the exercise group and 21 to the control group
Study start and stop dates: recruitment of participants took place between 2008 and 2009
Length of intervention: 12 weeks
Length of follow‐up: to end of the intervention
Participants Type cancer: breast cancer
Cancer stage, n (%):
  • exercise group: Stage I, 9 (47.4%); Stage II, 10 (52.6%); Stage IIIa, 0 (0%)

  • control group: Stage I, 6 (28.6%); Stage II, 12 (57.1%); Stage IIIa, 3 (14.3%)


Time since cancer diagnosis: not reported
Time in active treatment: receiving 12 weeks of adjuvant chemotherapy postoperatively
Inclusion criteria:
  • women with postoperative Stage I to IIIA breast cancer

  • receiving adjuvant chemotherapy during the study period

  • ≥ 18 years old


Eligibility criteria related to interest or ability, or both, to exercise:
  • skeletomuscular deficits that would contraindicate a walking exercise program

  • regularly engaged in > 1 session of moderate‐intensity exercise per week over the past 6 months


Exclusion criteria:
  • uncontrolled hypertension, diabetes mellitus, cardiac, or psychiatric illness


Gender: female
Current age, mean (SD) years:
  • exercise group: 50.79 (7.05) years

  • control group: 52.71 (8.11) years


Age at cancer diagnosis: not reported
Ethnicity/race: not reported
Education level: not reported
SES: not reported
Employment status, employed, n (%):
  • exercise group: 3 (15.8%)

  • control group: 8 (38.1%)


BMI, mean (SD)
  • exercise group: 23.09 (3.32)

  • control group: 24.37 (3.23)


Comorbidities: none reported
Past exercise history: not reported
Interventions 19 participants assigned to the exercise intervention, including:
  • 12‐week home‐based walking program, developed using the American College of Sports Medicine Guidelines, and included walking starting 2 to 3 days after each chemotherapy session. The intervention included:

    • 5 minutes' warm‐up

    • 30 minutes' brisk walking

    • 5 minutes' cool down


Type exercise: (aerobic/anaerobic): aerobic
Intensity of the experimental exercise intervention: moderate‐intensity brisk walking (60% to 80% of age‐adjusted maximal HR)
Frequency: 3 times per week
Duration of individual sessions: about 40 minutes
Duration of exercise program: 12 weeks
Total number of exercise sessions: 36 sessions
Format: individual
Facility: home
Professionally led: not professionally led
Adherence: adherence to the exercise intervention was about 77% (31.2 of 36) of the prescribed exercise sessions and 100% of the prescribed exercise intensity
21 participants assigned to control group, including:
  • maintenance of their previous lifestyle for 12 weeks


Contamination of control group: not reported
Outcomes No primary outcome was identified. QoL outcomes included:
  • symptom severity, assessed using the MDASI‐Taiwanese Version (MDASI‐T)

  • symptoms interference with daily life, assessed using the MDASI‐T

  • emotional distress, assessed using the POMS‐SF


Other outcomes included:
  • self‐reported physical activity level, assessed using the Seven‐Day Physical Activity Recall (7‐Day PAR)


Outcomes were measured at baseline, 6 weeks, and 12 weeks:
  • exercise group: n = 19 at baseline, n = 19 at 6 weeks, n = 19 at 12 weeks

  • control group: n = 21 at baseline, n = 21 at 6 weeks, n = 21 at 12 weeks


Subgroup analysis: none reported
Adverse events: no participants experienced any adverse events related to home‐based exercise during the 12‐week study period
Notes Country: Taiwan
Funding: Taipei Medical University Hospital
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk The random location sequence was generated using a table of random numbers
Allocation concealment (selection bias) Unclear risk Whether the treatment assigned was concealed from study personnel and participants was not described
Blinding of participants and personnel (performance bias)
All outcomes High risk Owing to the nature of the intervention, it was not possible to conceal allocation to the intervention from the participants
Blinding of outcome assessment (detection bias)
All outcomes High risk Allocation to the intervention was not concealed from the study personnel
Incomplete outcome data (attrition bias)
All outcomes High risk 44 women were randomly assigned to exercise or control groups and 40 women completed the trial. No information is provided on the 4 women who did not complete the trial
Selective reporting (reporting bias) Low risk There appears to be no selective reporting of outcomes
Other bias Low risk The trial appears to be free of other problems that could put it at a high risk of bias

6MWD: 6‐minute walk distance; 7‐Day PAR: Seven‐Day Physical Activity Recall; HR: heart rate; AFI: Attentional Functional Index; ALL: acute lymphoblastic leukemia; AML: acute myelogenous leukemia; BDI: Beck's Depression Inventory; BFI: Brief Fatigue Inventory; BMD: bone mineral density; BMI: body mass index; Borg RPE: Borg Rating of Perceived Exertion; CCS: Canadian Cancer Society; CES‐D: Center for Epidemiological Studies Depression scale; CML: chronic myeloid leukemia; CRP: C‐reactive protein; DXA: dual energy X‐ray absorptiometry; ECOG: Eastern Cooperative Oncology Group; EORTC: European Organization for Research and Treatment of Cancer; EPIC: Expanded Prostate Cancer Index Composite; ESES: Exercise Self‐efficacy Scale; EWB: emotional well‐being; FACIT‐F: Functional Assessment of Chronic Illness Therapy ‐ Fatigue; FACIT‐Sp: Functional Assessment of Chronic Illness Therapy ‐ Spiritual; FACT‐An: Functional Assessment of Cancer Therapy ‐ Anemia; FACT‐B: Functional Assessment of Cancer Therapy ‐ Breast; FACT‐Cog: Functional assessment of Cancer Therapy ‐ Cognitive Function; FACT‐ES: Functional Assessment of Cancer Therapy ‐ Endocrine symptoms; FACT‐F: Functional Assessment of Cancer Therapy ‐ Fatigue; FACT‐G: Functional Assessment of Cancer Therapy ‐ General; FACT‐P: Functional Assessment of Cancer Therapy ‐ Physical; FACT‐P: Functional Assessment of Cancer Therapy ‐ Prostate; FACT‐Sp: Functional Assessment of Cancer Therapy ‐ Spirituality; FAEPEX : Ao Fundo de Apoio ao Ensino, Pesquisa e Entenxao; FLIC: Functional Living Index for Cancer; FWB: functional well‐being; GLTEQ: Goldin Leisure Time Exercise Questionnaire; HADS: Hospital Anxiety and Depression Scale; HDC: high‐dose chemotherapy; HL: Hodgkin lymphoma; HR: heart rate; HRQoL: health‐related quality of life; HSCT: hematopoietic stem cell transplantation; ITT: intention‐to‐treat; LASA: Linear Analog Scales of Assessment; LHRHa: luteinizing hormone‐releasing hormone analogue; LOCF: last observation carried forward; LSI: Leisure Score Index; MANE: Morrow Assessment of Nausea and Emesis; MCS: mental component status; MDASI‐T: M.D. Anderson Symptom Inventory‐Taiwanese Version; MFI: Multidimensional Fatigue Inventory; MFSI‐SF: Multidimensional Fatigue Symptom Inventory Short Form; MMSE: Mini Mental Status Examination; MOS SF‐36: Medical Outcomes 36‐Item Short Form Health Survey; MVT: maximum voluntary torque; MWT: minute walk test; NCIC: National Cancer Institute of Canada; NHL: non‐Hodgkin lymphoma; NYHA: New York Heart Association; PANAS: Positive and Negative Affect Schedule; PCS: physical component status; PFS: Piper Fatigue Scale; POMS: Profile of Mood States; POMS‐SF; Profile of Mood State‐Short Form; PSA: prostate specific antigen; PSQI: Pittsburgh Sleep Quality Inventory; PWB: physical well‐being; QLQ: Quality of Life Questionnaire; QoL: quality of life; ROM: range of motion; rPAR‐Q: revised Physical Activity Readiness Questionnaire; SCFS: Schwartz Cancer Fatigue Scale; SCL: Symptom Check List; SPAQ: Scottish Physical Activity Questionnaire; SPSS Expectation Maximization; STAI: State‐Trait Anxiety Index; SWB: social/family well‐being; SWLS: Satisfaction with Life Scale; TOI‐An: Trial Outcome Index ‐ Anemia; UNICAMP: da Universidade Estadual de Campinas; VAS: visual analog scale; VO2max: maximal oxygen uptake; VYASA: Vivekananda Yoga Anusandhana Samsthana; WHO: World Health Organization; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.