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Effects of corrective exercises on posture, pain, and muscle activation of patients with chronic neck pain exposed to anterior-posterior perturbation [with consumer summary]
Mehri A, Letafatkar A, Khosrokiani Z
Journal of Manipulative and Physiological Therapeutics 2020 May;43(4):311-324
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

OBJECTIVES: This study aimed to evaluate the effects of corrective exercises on posture, pain, and muscle activation of patients with chronic neck pain exposed to anterior-posterior perturbation. METHODS: A total of 32 women (37.76 +/- 3.83 years) with chronic, nonspecific neck pain were randomized into corrective exercise and control groups. The experimental group underwent a corrective exercise program for 8 weeks, 30 min/d, 3 days per week. The control group received active self-exercise instructions. Neck pain, forward head and protracted shoulder posture, and timing of superficial neck muscle activation were evaluated using the visual analog scale, photogrammetry, and electromyogram, respectively, before and then 48 hours after the 8-week program for both the experimental and control groups. All measurements at pretest and posttest were taken by a blinded assessor. RESULTS: Significant alterations were observed in cervical angle (p = 0.003, effect size = 0.329), shoulder angle (p = 0.008, effect size = 0.457), neck pain and disability (p = 0.009, effect size = 0.645), movement control (p = 0.038, effect size = 0.353), activation onset of the upper trapezius (p = 0.015, effect size = 0.746), the sternocleidomastoid (p = 0.018, effect size = 0.879) and cervical erector spinae (p = 0.031, effect size = 0.765), and the root mean square of the upper trapezius (p = 0.033, effect size = 0.742), the sternocleidomastoid (p = 0.041, effect size = 0.587), and the cervical erector spinae (p = 0.024, effect size = 0.832) in the intervention group from pre- to posttest (p < 0.05). CONCLUSION: Positive and significant alterations have been observed in the forward head and protracted shoulder posture, the timing of superficial neck muscle activation, neck pain, and disability in female patients with chronic neck pain exposed to anterior-posterior perturbation after performing an 8-week corrective exercise program.
Reprinted from the Journal of Manipulative and Physiological Therapeutics with copyright permission from the National University of Health Sciences.

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