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首页> 外文期刊>The Journal of Musculoskeletal and Neuronal Interactions >Electrically induced muscle cramps induce hypertrophy of calf muscles in healthy adults
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Electrically induced muscle cramps induce hypertrophy of calf muscles in healthy adults

机译：电诱发的抽筋可诱发健康成年人的小腿肌肉肥大

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Objectives: Skeletal muscles usually cramp at short lengths, where the tension that can be exerted by muscle fibers is low. Since high tension is an important anabolic stimulus, it is questionable if cramps can induce hypertrophy and strength gains. In the present study we investigated if electrically induced cramps (EIMCs) can elicit these adaptations. Methods: 15 healthy male adults were randomly assigned to an intervention (IG; n=10) and a control group (CG; n=5). The cramp protocol (CP) applied twice a week to one leg of the IG, consisted of 3x6 EIMCs, of 5 s each. Calf muscles of the opposite leg were stimulated equally, but were hindered from cramping by fixating the ankle at 0° plantar flexion (nCP). Results: After six weeks, the cross sectional area of the triceps surae was similarly increased in both the CP (+9.0±3.4%) and the nCP (+6.8±3.7%). By contrast, force of max- imal voluntary contractions, measured at 0° and 30° plantar flexion, increased significantly only in nCP (0°: +8.5±8.8%; 30°: 11.7±13.7%). Conclusion: The present data indicate that muscle cramps can induce hypertrophy in calf muscles, though lacking high tension as an important anabolic stimulus.
机译：目标：骨骼肌通常会短促抽筋，其中肌肉纤维可施加的张力较低。由于高压是一种重要的合成代谢刺激，因此抽筋是否会引起肥大和体力增加值得怀疑。在本研究中，我们调查了电动抽筋（EIMC）是否可以引起这些适应。方法：将15名健康男性成年人随机分为干预组（IG; n = 10）和对照组（CG; n = 5）。抽筋方案（CP）每周两次应用到IG的一条腿上，该腿由3x6 EIMC组成，每个5s。对方腿的小腿肌肉受到同等的刺激，但由于将脚踝固定在足底屈曲0°（nCP）处而无法抽筋。结果：六周后，CP（+ 9.0±3.4％）和nCP（+ 6.8±3.7％）的三头肌肱三头肌横截面积均相似地增加。相比之下，仅在nCP（0°：+ 8.5±8.8％; 30°：11.7±13.7％）时，在0°和30°plant屈时测得的最大自愿收缩力显着增加。结论：目前的数据表明，肌肉痉挛可引起小腿肌肉肥大，尽管缺乏高张力作为重要的合成代谢刺激。

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