【論文摘要】The Comparison of the Effects of Pectoralis Minor Self-Massage and Eccentric Exercise and Periscapular Muscles Strengthening on Muscle Flexibility, Periscapular Muscles Strength and Neck-Shoulder Posture in Subjects With Scapular Dyskinesis

【論文摘要】比較胸小肌離心運動、肩胛肌群訓練與自我按摩於肩胛運動障礙受試者之胸小肌長度、肩胛肌群肌力與頭頸肩姿勢之成效

林容睿(Rong-Ruei Lin) ； 陳昭縈(Chao-Ying Chen) ； 陳柏村(Po-Tsun Chen)

《物理治療》 47卷4期 (2022/12) Pp. 285-286

https://doi.org/10.6215/FJPT.202212.O10

摘要

Background and Purpose: Previous studies have shown that the tightness of pectoralis minor (Pm) and the imbalanced strength of periscapular muscles (Ps) may associate with the poor posture and scapular dyskinesis (ScD). Strengthening exercise is commonly used to enhance the strength of Ps while the self-massage maneuver was generally recommended for releasing the tightness of Pm. The eccentric exercise can lengthen the shortened muscle but seldom applied on the tightened Pm. Therefore, the aims of this study were to compare the effects of self-massage, eccentric, and Ps strengthening on Pm length and Ps strength as well as the influence on posture changes in college students with ScD. Methods: Nineteen collegiate students with ScD were recruited and allocated into three groups, including eccentric exercise for Pm (ECPm), strengthening exercise for Ps (STPs), and self-massage for Pm (SMPm) groups, to receive 4-week intervention. The subjects performed posterior tilting and external rotation of scapula eccentrically with elastic band as ECPm. For STPs, the control exercises for middle and lower trapezius and serratus anterior were executed. The SMPm group used a massage ball to release Pm. The length of Pm, forward shoulder angle and maximal strength of shoulder rotators and Ps were measured before and after interventions. The Wilcoxon signed rank test was used to compare the intervention outcomes in each group. The Kruskal-Wallis test was used to compare the changes after intervention between groups. Results: The length of Pm was increased significantly after training with ECPm (15.90 ± 0.69 cm vs. 17.12 ± 0.58 cm, p = 0.018) and STPs (15.62 ± 0.66 cm vs. 16.10 ± 0.67 cm, p = 0.028). The increment of Pm length with ECPm was larger than that with the other interventions. The strength of lower trapezius was increased with ECPm (22.10 ± 12.08 lb vs. 27.17 ± 11 lb, p = 0.028) and with STPs (19.44 ± 9.28 lb vs. 24.10 ± 10.58 lb, p = 0.046). There was no significant change of posture in each group. Conclusions: The shortness of Pm and/ or the weakness of Ps cause the SD, which should be evaluate comprehensively for an effective intervention. Clinical Relevance: The ECPm and STPs may have better effects on Pm length and strength of Ps than the SMPm alone.