[Spectral analysis of electromyography of low back muscle fatigue induced by simulated driving].
OBJECTIVE
To evaluate the effects of different vibration frequency on the back muscle fatigue during simulated driving.


METHODS
Thirty-six subjects performed three simulated driving experiments under three vertical vibration frequencies which were 1.8, 4.0, 6.0 Hz respectively and the driving time was 90 minutes. At the same time the electromyography of low back was recorded.


RESULTS
The median frequencies calculated from the power spectrum were decreased exponentially under three vertical vibration frequencies, especially under 4.0 Hz vibration frequency.


CONCLUSIONS
The 4.0 Hz vibration frequency has the most important effect on the back muscle fatigue under simulated driving condition.
Li
Zeng-yong
ZY
Vechile Working Group, School of Mechanical Engineering, Shangdong University, Jinan 250061, China.
Jiao
Kun
K
Chen
Ming
M
Wang
Cheng-tao
CT
Yang
Yu-shu
YS
D000328:Adult; D001334:Automobile Driving; D004576:Electromyography / Q000379:methods; D006801:Humans; D017116:Low Back Pain / Q000209:etiology / Q000503:physiopathology; D008297:Male; D008954:Models, Biological; D018763:Muscle Fatigue / Q000502:physiology*; D009132:Muscles / Q000502:physiology; D011187:Posture / Q000502:physiology