Spectral properties of H-reflex recordings after an acute bout of whole-body vibration Public Deposited

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This is a non-final version of an article published in final form in Kipp, K., Johnson, S. T., & Hoffman, M. A. (2012, July). Spectral properties of H-reflex recordings after an acute bout of whole-body vibration. Journal of Strength and Conditioning Research, 26(7), 1915-1919. doi:10.1519/JSC.0b013e3182392ae9. You can find the journal here:  http://journals.lww.com/nsca-jscr/pages/default.aspx

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  • Although research supports the use of whole-body vibration (WBV) to improve neuromuscular performance, the mechanisms for these improvements remain unclear. The purpose of this study was to identify the effect of WBV on the spectral properties of electrically evoked H-reflex recordings in the soleus (SOL) muscle. The H-reflex recordings were measured in the SOL muscle of 20 participants before and after a bout of WBV. The H-reflexes were evoked every 15 seconds for 150 seconds after WBV. A wavelet procedure was used to extract spectral data, which were then quantified with a principle components analysis. Resultant principle component scores were used for statistical analysis. The analysis extracted 1 principle component associated with the intensity of the myoelectric spectra and 1 principle component associated with the frequency. The scores of the principle component that were related to the myoelectric intensity were smaller at 30 and 60 milliseconds after WBV than before WBV. The WBV transiently decreased the intensity of myoelectric spectra during electrically evoked contractions, but it did not influence the frequency of the spectra. The decrease in intensity likely indicates a smaller electrically evoked muscle twitch response, whereas the lack of change in frequency would indicate a similar recruitment pattern of motor units before and after WBV.
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  • Kipp, K., Johnson, S. T., & Hoffman, M. A. (2012, July). Spectral properties of H-reflex recordings after an acute bout of whole-body vibration. Journal of Strength and Conditioning Research, 26(7), 1915-1919. doi:10.1519/JSC.0b013e3182392ae9
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  • description.provenance : Made available in DSpace on 2012-08-20T21:11:55Z (GMT). No. of bitstreams: 1 JohnsonSamuelPublicHHSSpectralPropertiesHReflex.pdf: 191257 bytes, checksum: c7fd621a12fd47dbefdd7601bc96ca77 (MD5) Previous issue date: 2012-07
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2012-08-20T21:11:55Z (GMT) No. of bitstreams: 1 JohnsonSamuelPublicHHSSpectralPropertiesHReflex.pdf: 191257 bytes, checksum: c7fd621a12fd47dbefdd7601bc96ca77 (MD5)
  • description.provenance : Submitted by Sue Kunda (sue.kunda@oregonstate.edu) on 2012-08-20T21:10:57Z No. of bitstreams: 1 JohnsonSamuelPublicHHSSpectralPropertiesHReflex.pdf: 191257 bytes, checksum: c7fd621a12fd47dbefdd7601bc96ca77 (MD5)

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