抗阻训练男性在进行70%和90% 1次重复最大重量的抗阻运动时的肌肉激活情况。
Muscle activation during resistance exercise at 70% and 90% 1-repetition maximum in resistance-trained men.
作者信息
Gonzalez Adam M, Ghigiarelli Jamie J, Sell Katie M, Shone Edward W, Kelly Christopher F, Mangine Gerald T
机构信息
Department of Health Professions, Hofstra University, Hempstead, New York, 11549, USA.
Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia, USA.
出版信息
Muscle Nerve. 2017 Sep;56(3):505-509. doi: 10.1002/mus.25509. Epub 2017 Apr 2.
INTRODUCTION
Muscle activation was investigated during resistance exercise with 2 relatively high-intensity loads.
METHODS
Ten resistance-trained men performed the leg press exercise to repetition failure: a set at 70% of 1-repetition maximum (1RM) and a set at 90% of 1RM. Surface electromyography (EMG) was used to assess peak and mean muscle activation of the vastus lateralis, rectus femoris, and vastus medialis.
RESULTS
Peak and mean EMG remained greater at 90% than 70% 1RM across all repetitions (P = 0.03 and P = 0.02, respectively). Main effects for trial were also significant for mean EMG activity of the final common repetitions (P = 0.03) favoring 90% 1RM; however, peak EMG activity was similar during the final common repetitions of the 70% and 90% 1RM sets.
CONCLUSIONS
Across all repetitions, 90% 1RM appears to produce greater muscle activation during the leg press exercise, but similar peak EMG was observed during the final common repetitions of each set. Muscle Nerve 56: 505-509, 2017.
引言
在使用两种相对高强度负荷进行抗阻训练期间，对肌肉激活情况进行了研究。
方法
10名接受过抗阻训练的男性进行腿举练习直至重复次数极限：一组以1次重复最大值（1RM）的70%进行，另一组以1RM的90%进行。使用表面肌电图（EMG）评估股外侧肌、股直肌和股内侧肌的峰值和平均肌肉激活情况。
结果
在所有重复次数中，90% 1RM时的峰值和平均肌电图均高于70% 1RM时（分别为P = 0.03和P = 0.02）。对于最后共同重复次数的平均肌电图活动，试验的主效应也具有显著性（P = 0.03），支持90% 1RM；然而，在70%和90% 1RM组的最后共同重复次数期间，峰值肌电图活动相似。
结论
在所有重复次数中，90% 1RM在腿举练习期间似乎能产生更大的肌肉激活，但在每组的最后共同重复次数期间观察到相似的峰值肌电图。《肌肉与神经》56: 505 - 509, 2017年。
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