中文摘要：

目的通过施加不同条件下的振动刺激，探讨正常人体小腿肌肉是否存在最佳的振动激活频率以及频率范围。方法共选取健康大学生19名，分别于坐位、立位、半蹲位（屈膝30。）和卧位下接受频率为10～50Hz的振动刺激，并采集振动前、振动中的的表面肌电数据。选取左腿胫骨前肌与腓肠肌内侧头作为检测肌肉，以左胫骨前肌远端为振动刺激点。分析不同条件的振动刺激激活小腿肌群的表面肌电特征。结果各种振动条件刺激均引起小腿肌肉放电量增加（P〈0．05）。各体位下胫骨前肌的肌电值在不同频率时差异均有统计学意义（P〈0．05），但30Hz、40Hz、50Hz间差异无统计学意义（P〉0．05）；各体位下腓肠肌的肌电值在各频率时差异均无统计学意义（P〉0．05）。结论引起小腿肌肉放电量增加的峰值频率主要集中在30-50Hz，可能为人体最佳的振动激活频率。

英文摘要：

Objective To explore the best vibration frequency for activating human muscles. Methods Nineteen healthy college students accepted vibration stimulation at frequencies between 10 and 50 Hz. Surface elec- tromyograms （sEMG） were recorded. The subjects were sitting, standing, squatting （knee flexion 30°） and recumbent. Their left anterior tibial muscles and the medial heads of the gastroenemius were targeted as test muscles. The vibration stimulation point was on the surface of the left distal tibia. The sEMG characteristics of the calf muscles were analyzed under vibration stimulation at different frequencies. Results The leg muscles were activated significantly at all vibration frequencies, but the sEMG values of the anterior tibialis were significantly different at different frequencies, except for among 30 Hz, 40 Hz and 50 Hz in any position. The gastrocnemius sEMG values were not significantly different at different frequencies. Conclusion Vibration at 30 to 50Hz may be the normal human mus- cle activation frequency.