FIBER CONDUCTION-VELOCITY AND FIBER COMPOSITION IN HUMAN VASTUS LATERALIS
FIBER CONDUCTION-VELOCITY AND FIBER COMPOSITION IN HUMAN VASTUS LATERALIS
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DOI：
10.1007/bf01076001
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发表时间：
1988-07-01
影响因子：
3
通讯作者：
KATSUTA, S
中科院分区：
文献类型：
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作者：
SADOYAMA, T;MASUDA, T;KATSUTA, S
采用股外侧肌穿刺活检标本，对19名20-24岁男子径赛运动员、12名短跑运动员和7名中长跑运动员的肌纤维组成与纤维传导速度的关系进行了研究。快缩（FT）和慢缩（ST）纤维的横截面积通过组织化学分析确定。FT纤维面积百分比范围为22.6%至93.6%。短跑运动员比长跑运动员有更高比例的FT纤维。肌纤维传导速度用沿肌纤维沿着放置的表面电极阵列测量，并从最大自主收缩期间记录的2个肌电信号之间的时间延迟计算。传导速度为4.13 ~ 5.20 m·cm ~（-1）。s-1条件下传导速度与FT纤维相对面积呈直线相关（r = 0.84，p < 0.01）。这种相关性表明，肌纤维组成可以估计从肌纤维传导速度测量非侵入性与表面电极。
The relationship between muscle fibre composition and fibre conduction velocity was investigated in 19 male track athletes, 12 sprinters and 7 distance runners, aged 20-24 years, using needle biopsy samples from vastus lateralis. Cross sectional areas of the fast twitch (FT) and slow twitch (ST) fibres were determined by histochemical analysis. The percentage of FT fibre areas ranged from 22.6 to 93.6%. Sprinters had a higher percentage of FT fibres than distance runners. Muscle fibre conduction velocity was measured with a surface electrode array placed along the muscle fibers, and calculated from the time delay between 2 myoelectric signals recorded during a maximal voluntary contraction. The conduction velocity ranged from 4.13 to 5.20 m .cntdot. s-1. A linear correlation between conduction velocity and the relative area of FT fibres was statistically significant (r = 0.84, p < 0.01). This correlation indicates that muscle fibre composition can be estimated from muscle fibre conduction velocity measured noninvasively with surface electrodes.