Differential atrophy of the postero-lateral hip musculature during prolonged bedrest and the influence of exercise countermeasures.
Differential atrophy of the postero-lateral hip musculature during prolonged bedrest and the influence of exercise countermeasures.
复制标题
长时间卧床期间髋部后外侧肌肉组织的差异性萎缩及运动对策的影响。
DOI：
10.1152/japplphysiol.01105.2010
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Belavy,DanielL
中科院分区：
文献类型：
--
作者：
Miokovic,Tanja;Armbrecht,Gabriele;Felsenberg,Dieter;Belavy,DanielL
作为第二次柏林卧床研究(BBR2-2)的一部分，我们调查了长时间不活动时髋关节后外侧肌肉和肌腱肌肉萎缩的模式，以及两种运动对策的有效性。24名男性受试者接受了60天的头朝下倾斜卧床休息，并被分配到无活动对照组(CTR)、阻性振动锻炼(RVE)或单独进行阻性锻炼(RE)组。在卧床前、卧床期间和卧床结束时进行髋部和大腿的磁共振成像(MRI)检查。计算髋关节后外侧肌和腿筋肌的体积，并检测肌肉萎缩率和对抗训练的效果。卧床60天后，对照组出现不同程度的肌肉体积丢失(F=21.44；P≤0.0001)，其中半膜肌、股四头肌和股二头肌的丢失最快，其次是臀肌和剩余的腿筋肌。在保持肌肉体积方面，全身振动似乎没有比阻力运动更多的效果。Re和Rve预防和/或减少臀肌、半膜肌和股二头肌长头肌的肌肉萎缩。对抗组的一些肌肉容量恢复时间比CTR组快。在长时间的卸载后，髋关节后外侧的肌肉发生了差异性萎缩。卧床期间进行持续时间短、负荷大的阻力运动可减少单关节髋关节伸肌和选定的腿筋肌的肌肉萎缩。未来的对策设计应该考虑包括孤立的阻力腿筋卷曲，以针对这一肌肉群，并减少肌肉失衡的发展潜力。
As part of the 2nd Berlin BedRest Study (BBR2-2), we investigated the pattern of muscle atrophy of the postero-lateral hip and hamstring musculature during prolonged inactivity and the effectiveness of two exercise countermeasures. Twenty-four male subjects underwent 60 days of head-down tilt bedrest and were assigned to an inactive control (CTR), resistive vibration exercise (RVE), or resistive exercise alone (RE) group. Magnetic resonance imaging (MRI) of the hip and thigh was taken before, during, and at end of bedrest. Volume of posterolateral hip and hamstring musculature was calculated, and the rate of muscle atrophy and the effect of countermeasure exercises were examined. After 60 days of bedrest, the CTR group showed differential rates of muscle volume loss (F= 21.44;P≤ 0.0001) with fastest losses seen in the semi-membranosus, quadratus femoris and biceps femoris long head followed by the gluteal and remaining hamstring musculature. Whole body vibration did not appear to have an additional effect above resistive exercise in preserving muscle volume. RE and RVE prevented and/or reduced muscle atrophy of the gluteal, semi-membranosus, and biceps femoris long head muscles. Some muscle volumes in the countermeasure groups displayed faster recovery times than the CTR group. Differential atrophy occurred in the postero-lateral hip musculature following a prolonged period of unloading. Short-duration high-load resistive exercise during bedrest reduced muscle atrophy in the mono-articular hip extensors and selected hamstring muscles. Future countermeasure design should consider including isolated resistive hamstring curls to target this muscle group and reduce the potential for development of muscle imbalances.
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作者：
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发表时间：
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影响因子：
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