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. 2015 Apr 30;27(4):1271–1276. doi: 10.1589/jpts.27.1271

Table 2. Summary of the included articles.

Study Subjects Intervention Outcome Results
Ylinen et al. 200714) 180 women with chronic (> 6 month) nonspecific neck pain Average age: 45.6 Strength group: n=60 Endurance group: n=60 Control group: n=60 Strength and endurance group rehabbed in center for 12 days, and home exercise for 12 months, 3 times a week. Total training time of 12 months Strength group: 80% maximum isometric neck resistance training with elastic rubber band in sitting, a single series of 15 repetitions; dynamic exercise with 2 kg-dumbbell: shrugs, press, curls, bent-over rows, flies, pullovers for 15 repetitions; squats, sit-ups, and back extension exercises; stretching exercises for neck shoulder and upper limb muscles; total exercise time of 1 hour Endurance group: lifting head up in supine position in 3 series of 20 repetitions; dynamic exercise as above with 3 series of 20 repetitions; squats, sit-ups, and back extension exercises; stretching exercise; total exercise time of 45 minutes Control group: stretching exercise was performed once and subjects were asked to practice at home for 20 minutes regularly 3 times a week (1) Pain-visual analogue scale (VAS) (2) Disability-Neck disability index (NDI) (3) Strength-handheld isometric strength testing device (4) Passive cervical range of motion (ROM) -multidimensional neck ROM device (5) Pressure pain threshold (PPT)- handheld electronic pressure algometer Follow-up: 12 months (all groups) and 36 months (no control group) ● At 12-month follow-up, all outcomes of the strength and endurance groups had improved more than the control group ● Pain, disability, PPT of both training groups and strength of the endurance group improved at the 12-month follow-up compared to baseline, and the value were unchanged at 36 months. However, there was no difference between the strength and endurance groups

Salo et al. 201010) Same as Ylinen et al. 200714) Same as Ylinen et al. 200714) (1) Quality of life-health-related quality of life (HRQoL): 15D questionnaire Follow-up: 12 months ● Strength and endurance of the exercise groups were greater than control group at the 12-month follow-up

Salo et al. 20129) From Ylinen et al. 2007, 101 chronic (> 6 month) nonspecific neck pain patients Average age: 40.5 Strength group: n=49 Control group: n=52 Strength group: same as the strength group above Control group: same as the control group above (1) Quality of life-health-related quality of life (HRQoL): RAND-36 Follow-up: 12 months ● No difference between groups at the 12-month follow-up

Taimela et al. 200011) 76 chronic (> 3 month) nonspecific neck pain patients Average age: 43.7 Strength group: n=21 Home exercise group: n=19 Control group: n=22 Strength group: cervicothoracic stabilization training, muscle relaxation training, behavioral exercise, eye fixation exercise, seated wobble-board training, total: 45 minutes, 2 times a week for 12 weeks Home exercise group: a lecture on neck pain and written information about neck exercise with two practices in small groups Control group: a lecture on neck pain and written information about neck exercise (1) Pain-VAS (2) Fear avoidance beliefs (3) Cervical mobility-goniometer (4) PPT on upper trapezius and levator scapulas- mechanical force gauge (5) Self-experienced working ability Follow-up: 3 and 12 months ● At 3rd month, pain of the 2 exercise groups was lower than in the control group, also PPT of the 2 exercise group higher than in the control group. ● No group differences at 12 months ● Self-experienced working ability of the strength group was higher than in the other groups at 3 and 12 months

Viljanen et al. 200312) 393 chronic (> 3 month) nonspecific neck pain patients Average age: 45 Dynamic muscle training group: n= 135 Relaxation training group: n=128 Control group: n=130 30 minutes a time, 3 times a week for 12 weeks group training (10 patients) Dynamic muscle training group: training neck and shoulder muscles with dumbbells (weight 1–3 kg) and stretching exercise Relaxation training group: progressive relaxation method, autogenic training, functional relaxation and systematic desensitization Control group: no intervention (1) Pain- Numeric Rating Scale (NRS) (2) Disability-NDI (3) Cervical range of motion-inclinometer (4) Dynamic muscle strength Follow-up: 3, 6 and 12 months ● Cervical side bending and rotation of the 2 training groups was larger than in the control group at 3, 6 and 12 months

Waling et al. 200213) 126 chronic trapezius myalgia Average age: 37.9 Strength group: n=34 Endurance group: n=34 Coordination group: n=31 Control group: n=27 Exercise training for 1 hour a time, 3 times a week for 10 weeks Strength group: neck and shoulder exercise with 10 to 12 maximal voluntary contractions in three sets Endurance group: arm-cycling and arm exercise with rubber band (30 RM= repetition maximum) Coordination group: body awareness training Control group: stress management, once a week, 2 hours a time, for 10 weeks (1) Neck and shoulder pain-VAS (2) Frequency of pain (3) PPT-Somedic pressure algomter Follow-up: 10 weeks, and 8, 17 and 36 months ● Pain reduced and PPT increased in all training groups at 10 weeks compared to baseline ● No difference between training groups and control group at 8 months ● At 36 months, no difference between the training groups and dropout subjects