Variations in muscle activation levels during traditional latissimus dorsi weight training exercises: An experimental study.
Variations in muscle activation levels during traditional latissimus dorsi weight training exercises: An experimental study.
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DOI：
10.1186/1476-5918-3-4
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发表时间：
2004-06-30
期刊：
影响因子：
--
通讯作者：
Nalborczyk, Andrea
中科院分区：
文献类型：
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作者：
Lehman, Gregory J;Buchan, Day Deans;Nalborczyk, Andrea
背景技术背景：关于肌肉激活水平的力量训练技术的变化，运动信念比比皆是，但很少有研究证实了这些想法。本研究的目的是确定在一系列不同的运动任务中，背阔肌、肱二头肌和中背肌/菱形肌群的肌肉激活水平，表示为正常化收缩的百分比。方法：在四个任务期间的平均肌肉活动;宽握下拉，反向握下拉[RGP]，肩胛骨回缩的坐行，和肩胛骨非回缩的坐行在两个10秒的等长部分的四个练习中进行量化。使用具有事后Tukey检验的重复测量ANOVA来确定运动类型对每块肌肉的肌肉活动的影响。结果与讨论：没有运动类型影响肱二头肌的活动。最高的背阔肌肱二头肌的比例激活发生在广泛的抓地力下拉和坐行。最高水平的肌电活动在中间的阔肌/菱形肌群发生在坐行。主动牵开肩胛骨不影响中肌/菱形肌活动。结论：背阔肌运动的变化能够对主要运动者的肌电活动产生微小的变化。
BACKGROUND: Exercise beliefs abound regarding variations in strength training techniques on muscle activation levels yet little research has validated these ideas. The purpose of the study is to determine muscle activation level, expressed as a percent of a normalization contraction, of the latissimus dorsi, biceps brachii and middle trapezius/rhomboids muscle groups during a series of different exercise tasks. METHODS: The average muscle activity during four tasks; wide grip pulldown, reverse grip pull down [RGP], seated row with retracted scapula, and seated rows with non-retracted scapulae was quantified during two 10 second isometric portions of the four exercises. A repeated measures ANOVA with post-hoc Tukey test was used to determine the influence of exercise type on muscle activity for each muscle. RESULTS & DISCUSSION: No exercise type influenced biceps brachii activity. The highest latissimus dorsi to biceps ratio of activation occurred during the wide grip pulldown and the seated row. Highest levels of myoelectric activity in the middle trapezius/rhomboid muscle group occurred during the seated row. Actively retracting the scapula did not influence middle trapezius/rhomboid activity. CONCLUSION: Variations in latissimus dorsi exercises are capable of producing small changes in the myoelectric activity of the primary movers.