title: [Spectral analysis of electromyography of low back muscle fatigue induced by simulated driving].
abstract: 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.
authors.affiliation: Vechile Working Group, School of Mechanical Engineering, Shangdong University, Jinan 250061, China.
authors.forename: Zeng-yong
authors.initials: ZY
authors.lastname: Li
authors.forename: Kun
authors.initials: K
authors.lastname: Jiao
authors.forename: Ming
authors.initials: M
authors.lastname: Chen
authors.forename: Cheng-tao
authors.initials: CT
authors.lastname: Wang
authors.forename: Yu-shu
authors.initials: YS
authors.lastname: Yang
mesh_terms: 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