Ingemann-Hansen T, Halkjaer-Kristensen J
Scand J Rehabil Med. 1983;15(1):29-35.
The effects of progressive resistance exercise (PRE) training for 4 weeks on the hypotrophic quadriceps muscle were investigated in 23 young healthy male soccer players, who had been immobilized in a plaster cast 4-6 weeks after knee ligament injuries. The subjects were allocated to two training regimes where the injured leg was trained for periods of varying duration, whereas the intensity and frequency of exercise were alike in the two groups. However no significant differences were detected between the two training groups. In the whole material the lean thigh volume of the injured leg increased from 4.09 to 4.47 litres (p less than 0.001), whereas the fat component of the thigh was unchanged. The dynamic strength (1 RM) of the injured leg increased from 14.0 kg to 27.0 kg and amounted to 87% of the control leg after 4 weeks of training. At this time the maximum isometric strength amounted to 114 Nm, which was 63% of strength in the control leg. Succinate dehydrogenase (SDH) in homogenates of muscle biopsy sample increased (i.e. 20%, p less than 0.05) to the same level as found in the control leg. No changes in phosphofructokinase (PFK) were observed. The type I fibre distribution was lower in the immobilized leg than in the control leg. These results indicate that, following muscular hypotrophy resulting from 4-6 weeks of immobilization, dynamic exercise can restore the oxidative potential, whereas the size and strength are only partly recovered.
对23名年轻健康的男性足球运动员进行了研究，这些运动员在膝韧带损伤4 - 6周后被石膏固定，调查了为期4周的渐进性抗阻训练（PRE）对萎缩的股四头肌的影响。受试者被分配到两种训练方案中，受伤腿接受不同时长的训练，而两组的运动强度和频率相同。然而，两个训练组之间未检测到显著差异。在整个样本中，受伤腿的瘦大腿体积从4.09升增加到4.47升（p小于0.001），而大腿的脂肪成分未改变。受伤腿的动态力量（1RM）从14.0千克增加到27.0千克，训练4周后达到对照腿的87%。此时最大等长力量达到114牛米，为对照腿力量的63%。肌肉活检样本匀浆中的琥珀酸脱氢酶（SDH）增加（即增加20%，p小于0.05），达到与对照腿相同的水平。未观察到磷酸果糖激酶（PFK）的变化。固定腿中的I型纤维分布低于对照腿。这些结果表明，在因4 - 6周固定导致肌肉萎缩后，动态运动可恢复氧化能力，而肌肉大小和力量仅部分恢复。
