Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26437
Title: Wavelet analysis of lumbar muscle oxygenation signals during whole-body vibration : implications for the development of localized muscle fatigue
Authors: Li, Z
Zhang, M 
Chen, G
Luo, S
Liu, F
Li, J
Keywords: Muscle oxygenation oscillation
Near-infrared spectroscopy
Vibration
Wavelet transform
Issue Date: 2012
Publisher: Springer
Source: European journal of applied physiology, 2012, v. 112, no. 8, p. 3109-3117 How to cite?
Journal: European journal of applied physiology 
Abstract: The objective of this study was to assess the effects of whole-body vibration (WBV) on lumbar muscle oxygenation oscillations in healthy men based on the wavelet transform of near-infrared spectroscopy signals. Twelve healthy participants were exposed to WBV at frequencies of 3, 4.5 and 6 Hz while muscle oxygenation signal was monitored before, during and recovery from WBV. With spectral analysis based on wavelet transform of NIR signal, six frequency intervals were identified (I, 0.005-0.0095 Hz; II, 0.0095-0.02 Hz; III, 0.02-0.06 Hz; IV, 0.06-0.16 Hz; V, 0.16-0.40 Hz and VI, 0.40-2.0 Hz). It was found that the muscle oxygenation oscillations at 4.5 Hz in the frequency intervals I, II and III was lower during WBV compared with that of at 3 Hz. Present results demonstrated WBV at 4.5 Hz induced lower oscillatory activities than that of at 3 Hz. The lower oscillatory activities might indicate a decrease in the efficiency of oxygen supply to the oxygenated tissue and such mechanism might contribute to the development of local muscle fatigue.
URI: http://hdl.handle.net/10397/26437
ISSN: 1439-6319
EISSN: 1439-6327
DOI: 10.1007/s00421-011-2298-0
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