Eriksson Crommert M, Ekblom M M, Thorstensson A
Family Medicine Research Centre, Örebro County Council, Örebro, Sweden; School of Health and Medical Sciences, Örebro University, Örebro, Sweden; The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
Scand J Med Sci Sports. 2014 Oct;24(5):758-63. doi: 10.1111/sms.12064. Epub 2013 Mar 15.
The purpose of the present study was to investigate the pattern of trunk muscle activation and intra-abdominal pressure (IAP) in a somewhat modified version of the clean and jerk lift. Nine healthy physically active male amateurs performed the exercise with a 30-kg barbell. Muscle activity was registered with electromyography from transversus abdominis (TrA) and obliquus internus (OI) using intramuscular electrodes and from rectus abdominis (RA) and erector spinae (ES) with surface electrodes. IAP was recorded with a nasogastric catheter. Measurements were made in various static positions throughout the lift and in the transitional phases separating them, both during lifting and lowering. The results demonstrated that the innermost abdominal muscle, TrA, showed increased activation levels in the two highest positions, whereas ES was most active, together with the highest IAP, in the lowest position. OI and RA showed generally little activation and no obvious trend throughout the lift. The results strengthen the view of a contributing role of TrA to the upright control of the trunk and indicate that the clean and jerk lift might constitute a whole-body exercise, still targeting the TrA muscle, in late-stage rehabilitation, especially for athletes during return to sports.
本研究的目的是调查在挺举练习的某种改良版本中躯干肌肉激活模式和腹内压（IAP）情况。九名健康且有体育锻炼习惯的男性业余爱好者使用30公斤杠铃进行此项运动。使用肌内电极通过肌电图记录腹横肌（TrA）和腹内斜肌（OI）的肌肉活动，使用表面电极记录腹直肌（RA）和竖脊肌（ES）的肌肉活动。通过鼻胃管记录腹内压。在整个挺举过程中的不同静态位置以及升降过程中分隔这些位置的过渡阶段进行测量。结果表明，最内层的腹部肌肉TrA在两个最高位置显示出激活水平增加，而ES在最低位置最为活跃，同时腹内压也最高。OI和RA在整个挺举过程中总体上激活较少且无明显趋势。这些结果强化了TrA对躯干直立控制起作用的观点，并表明挺举练习可能构成一种全身运动，在后期康复中仍以TrA肌肉为目标，特别是对于恢复运动的运动员。
