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首页> 外文期刊>International journal of sport nutrition >The effects of zinc depletion on peak force and total work of knee and shoulder extensor and flexor muscles.
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The effects of zinc depletion on peak force and total work of knee and shoulder extensor and flexor muscles.

机译：锌耗竭对膝盖和肩膀伸肌及屈肌的峰值力量和总功的影响。

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In this study we tested the effect of zinc (Zn) on muscle function in human. After receiving 12 mg Zn/day for 17 days, 8 male subjects received 0.3 mg Zn/day for either 33 or 41 days. Subjects were divided into two groups for repletion. Group A subjects received overnight infusions of 66 mg Zn on Days 1 and 10 and then were fed 12 mg Zn/day for another 16 days. Group B subjects were fed 12 mg Zn/day for 3 weeks. Peak force and total work capacity of the knee and shoulder extensor and flexor muscle groups were assessed using an isokinetic dynamometer at baseline, at two points during depletion, and at repletion. Plasma Zn declined significantly during depletion and remained below baseline levels after repletion. The peak force of the muscle groups tested was not affected by acute Zn depletion, however, total work capacity for the knee extensor muscles and shoulder extensor and flexor muscles declined significantly. The data suggest that acute Zn depletion alters the total work capacity of skeletal muscle.
机译：在这项研究中，我们测试了锌对人体肌肉功能的影响。在每天接受12毫克锌每天17天后，有8位男性受试者每天接受0.3毫克锌每天33天或41天。将受试者分为两组进行补充。 A组受试者在第1天和第10天接受了过夜的66 mg Zn输注，然后每天喂12 mg Zn，持续16天。 B组受试者每天喂12毫克锌，持续3周。使用等速测力计在基线，耗竭过程中的两个时间点和足量运动时评估膝盖和肩膀伸肌以及屈肌群的峰值力和总工作能力。耗竭期间血浆锌显着下降，并在耗竭后仍低于基线水平。所测试的肌肉群的峰值力量不受急性锌消耗的影响，但是，膝部伸肌和肩部伸肌与屈肌的总工作能力明显下降。数据表明，急性锌耗竭会改变骨骼肌的总工作能力。

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