Blood flow and muscle fatigue in SCI individuals during electrical stimulation.
Blood flow and muscle fatigue in SCI individuals during electrical stimulation.
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电刺激期间 SCI 个体的血流和肌肉疲劳。
DOI：
10.1152/japplphysiol.00736.2002
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
McCully,KevinK
中科院分区：
文献类型：
--
作者：
Olive,JenniferL;Slade,JillM;Dudley,GaryA;McCully,KevinK
我们的目的是在电刺激过程中测量慢性、完全、脊髓损伤（SCI）和健全（AB）个体的血流量和肌肉疲劳。四头肌的电刺激被用来引起类似的激活肌肉质量。通过多普勒超声测量股动脉中的血流量。SCI患者的肌肉疲劳程度显著高于AB患者（3 - 8倍，P≤ 0.001）。血流量的大小在组间没有显著差异。与AB组相比，SCI组在运动开始时达到血流量峰值的半衰期延长（5倍，P= 0.001），运动结束时血流量恢复（3倍，P= 0.009）。总之，电刺激的肌肉血流量的大小与SCI个体的肌肉疲劳增加无关。然而，达到峰值血流的时间延长可能是SCI患者疲劳增加的一种解释。
Our purpose was to measure blood flow and muscle fatigue in chronic, complete, spinal cord-injured (SCI) and able-bodied (AB) individuals during electrical stimulation. Electrical stimulation of the quadriceps muscles was used to elicit similar activated muscle mass. Blood flow was measured in the femoral artery by Doppler ultrasound. Muscle fatigue was significantly greater (three- to eightfold,P≤ 0.001) in the SCI vs. the AB individuals. The magnitude of blood flow was not significantly different between groups. A prolonged half-time to peak blood flow at the beginning of exercise (fivefold,P= 0.001) and recovery of blood flow at the end of exercise (threefold,P= 0.009) was found in the SCI vs. the AB group. In conclusion, the magnitude of the muscle blood flow to electrical stimulation was not associated with increased muscle fatigue in SCI individuals. However, the prolonged time to peak blood flow may be an explanation for increased fatigue in SCI individuals.