Castelein Birgit, Cagnie Barbara, Parlevliet Thierry, Cools Ann
Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University Hospital, Ghent, Belgium.
Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University Hospital, Ghent, Belgium.
Man Ther. 2016 Apr;22:158-64. doi: 10.1016/j.math.2015.12.002. Epub 2015 Dec 22.
The Serratus Anterior (SA) has a critical role in stabilizing the scapula against the thorax. Research has linked shoulder and neck disorders to impairments in the SA activation. Exercises that target the SA are included in the rehabilitation of shoulder or neck pain and mostly include a protraction component. The Pectoralis Minor (PM) functions as a synergist of the SA. From the literature it is unclear to what extent PM is activated during SA exercises.
To determine the activity of SA and PM during different protraction exercises.
Controlled laboratory study.
26 subjects performed 3 exercises: Modified Push-Up Plus (Wall Version), Modified Knee Push-Up Plus (Floor version) and Serratus Punch. Electromyographic (EMG) data was collected from the SA (surface) and PM (fine-wire EMG).
During the Serratus Punch the SA activity was significantly higher than the PM activity. During the Modified Push-Up Plus exercises (both Wall and Floor version), the SA and PM activity were comparable. The PM showed the highest activity during the Serratus Punch and the Modified Push-Up Plus (Floor), which was significantly higher than during the Modified Push-Up Plus (Wall). The SA showed the highest activity during the Serratus Punch, which was significantly higher than during the Modified Push-Up Plus (Floor) which was in turn significantly higher than the activity during the Modified Push-Up Plus (Wall).
All exercises activated the PM between 15 and 29% Maximum Voluntary Isometric Contraction and the SA between 15 and 43%. The Modified Push-Up Plus exercise against the wall and the floor activated the SA and PM to a similar degree. When maximum activation of the SA with minimal activation of the PM is desired in healthy subjects, the "Serratus punch" seems to be the optimal exercise.
前锯肌（SA）在稳定肩胛骨与胸廓的关系中起关键作用。研究已将肩部和颈部疾病与前锯肌激活受损联系起来。针对前锯肌的锻炼被纳入肩部或颈部疼痛的康复训练中，且大多包含前伸动作。胸小肌（PM）作为前锯肌的协同肌发挥作用。从文献中尚不清楚在进行前锯肌锻炼时胸小肌被激活的程度。
确定在不同前伸锻炼过程中前锯肌和胸小肌的活动情况。
对照实验室研究。
26名受试者进行3项锻炼：改良俯卧撑加强版（靠墙版）、改良跪姿俯卧撑加强版（地面版）和锯肌冲拳动作。从前锯肌（表面）和胸小肌（细丝肌电图）收集肌电图（EMG）数据。
在锯肌冲拳动作中，前锯肌的活动显著高于胸小肌的活动。在改良俯卧撑加强版锻炼（靠墙版和地面版）中，前锯肌和胸小肌的活动相当。胸小肌在锯肌冲拳动作和改良俯卧撑加强版（地面版）中表现出最高活动，显著高于改良俯卧撑加强版（靠墙版）中的活动。前锯肌在锯肌冲拳动作中表现出最高活动，显著高于改良俯卧撑加强版（地面版）中的活动，而改良俯卧撑加强版（地面版）中的活动又显著高于改良俯卧撑加强版（靠墙版）中的活动。
所有锻炼激活胸小肌的程度为最大自主等长收缩的15%至29%，激活前锯肌的程度为15%至43%。靠墙和在地面进行的改良俯卧撑加强版锻炼对前锯肌和胸小肌的激活程度相似。在健康受试者中，若希望在前锯肌最大程度激活的同时胸小肌最小程度激活，“锯肌冲拳”似乎是最佳锻炼动作。
