Journal article
Trunk muscle electromyography and whole body vibration
Journal of biomechanics, Vol.22(3), pp.219,223-221,229
1989
DOI: 10.1016/0021-9290(89)90090-0
PMID: 2722893
Abstract
By measuring the electromyographic (EMG) activity of the paraspinal muscles, we have estimated the average and peak-to-peak torque imposed on the spine during whole body vibration. Six subjects had surface electrodes placed on their erector spinae muscles at the L3 level. The EMG-torque relationship was estimated by having each subject perform isometric horizontal pulls in an upright seated posture. The subject was then vibrated vertically and sinusoidally in a controlled, flexed, slightly lordotic seated posture, in 1 Hz increments from 3 to 10 Hz at a 0.1 g RMS seat acceleration level. Between vibration readings taken at each frequency, a static reading was also taken with the subject maintaining the same posture. The entire vibration-static 3–10 Hz test was repeated for reliability purposes. Specialized digital signal processing techniques were developed for the EMG signals to enhance the measured cyclic muscle activity and to allow automatic measurement of the time relationship between the mechanical displacement and the estimated torque. We found significantly more average and peak-to-peak estimated torque at almost all frequencies for vibration vs static sitting.
Details
- Title: Subtitle
- Trunk muscle electromyography and whole body vibration
- Creators
- Richard E SeroussiDavid G WilderMalcolm H Pope
- Resource Type
- Journal article
- Publication Details
- Journal of biomechanics, Vol.22(3), pp.219,223-221,229
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/0021-9290(89)90090-0
- PMID
- 2722893
- ISSN
- 0021-9290
- eISSN
- 1873-2380
- Language
- English
- Date published
- 1989
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Occupational and Environmental Health
- Record Identifier
- 9984064207302771
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