Modulation in voluntary neural drive in relation to muscle soreness.
Modulation in voluntary neural drive in relation to muscle soreness.
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DOI：
10.1007/s00421-007-0604-7
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发表时间：
2008-03
影响因子：
3
通讯作者：
Perrey S
中科院分区：
文献类型：
--
作者：
Racinais S;Bringard A;Puchaux K;Noakes TD;Perrey S
本研究的目的是探讨(1)在足底屈肌进行无力竭的偏心运动后，脊髓调制是否会发生改变，从而产生肌肉酸痛；(2)运动指令的中枢调制是否与肌肉酸痛的发生有关。10名健康受试者自愿进行单次反向下坡步行练习(持续30min，速度1ms−1，负级−25%，负重12%体重)。分别于运动前、运动后即刻、运动后1~3d进行神经肌肉测试[H反射、M波、最大自主扭矩(MVT)]。运动后即刻，足底屈肌的−下降了15%，部分原因是收缩特性的改变(电诱发的机械抽动的−下降了23%)。然而，MVT在第三天前未能恢复，而收缩特性在第一天内显著恢复。MVT恢复的延迟可能与自主性肌肉驱动力的减弱有关。在根据H反射估计的脊髓调制没有任何变化的情况下，自主激活的减少发生。我们的发现表明，脊髓上调制的发展可能与肌肉酸痛的存在有关。
The aim of this study was to investigate whether (1) spinal modulation would change after non-exhausting eccentric exercise of the plantar flexor muscles that produced muscle soreness and (2) central modulation of the motor command would be linked to the development of muscle soreness. Ten healthy subjects volunteered to perform a single bout of backward downhill walking exercise (duration 30 min, velocity 1 ms−1, negative grade −25%, load 12% of body weight). Neuromuscular test sessions [H-reflex, M-wave, maximal voluntary torque (MVT)] were performed before, immediately after, as well as 1–3 days after the exercise bout. Immediately after exercise there was a −15% decrease in MVT of the plantar flexors partly attributable to an alteration in contractile properties (−23% in electrically evoked mechanical twitch). However, MVT failed to recover before the third day whereas the contractile properties had significantly recovered within the first day. This delayed recovery of MVT was likely related to a decrement in voluntary muscle drive. The decrease in voluntary activation occurred in the absence of any variation in spinal modulation estimated from the H-reflex. Our findings suggest the development of a supraspinal modulation perhaps linked to the presence of muscle soreness.
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影响因子：
2.5
作者：
Racinais, S.;Girard, O.;Perrey, S.
通讯作者：
Perrey, S.
影响因子：
3.3
作者：
Aagaard, P;Simonsen, EB;Dyhre-Poulsen, P
通讯作者：
Dyhre-Poulsen, P
影响因子：
5.5
作者：
Andersen, B;Westlund, B;Krarup, C
通讯作者：
Krarup, C
影响因子：
3.3
作者：
Avela, J;Kyröläinen, H;Rama, D
通讯作者：
Rama, D
影响因子：
5.5
作者：
GARLAND, SJ
通讯作者：
GARLAND, SJ