European Journal of Applied Physiology

, Volume 95, Issue 5–6, pp 447–453 | Cite as

Cerebral oxygenation and blood volume responses to seated whole-body vibration

  • Rammohan V. Maikala
  • Sharla King
  • Yagesh N. Bhambhani
Original Article
First Online:
Accepted:

Abstract

Role of backrest support and hand grip contractions on regional cerebral oxygenation and blood volume were evaluated by near infrared spectroscopy in 13 healthy men during whole-body vibration (WBV). Subjects were exposed to three WBV (3, 4.5, and 6 Hz at ∼0.9 grms in the vertical direction), in a randomized order on separate days. During WBV, subjects performed right-hand maximal voluntary intermittent rhythmic hand grip contractions for 1 min. Subjects demonstrated highest oxygenation and blood volume values at 4.5 Hz, however, these responses were similar with and without backrest support (P>0.01). Compared to WBV alone, addition of hand grip exercise during WBV further increased oxygenation (0.07±0.11 vs. 0.004±0.11 od, P=0.003) and blood volume (0.156±0.20 vs. 0.066±0.17 od, P=0.000) in the right forehead. Peak oxygen uptake did not correlate to changes in oxygenation and blood volume (P>0.01). Based on the increase in ventilation volume and no change in the ratio of ventilation volume and expired carbon dioxide (P>0.01), it is concluded that WBV induces hyperventilation that might activate the pre-frontal cortical region, thus influencing cerebral responses through neuronal activation.

Keywords

Near infrared spectroscopy Hand grip contractions Transmissibility Backrest support Gas exchange responses Aerobic fitness 
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Notes

Acknowledgements

This study was part of the doctoral dissertation done by the first author at the University of Alberta, Edmonton, Canada. This project was partly supported by the Small Faculties Grant, University of Alberta, Edmonton, Canada. The authors sincerely thank the Occupational Performance and Analysis Unit for Vibration equipment, and Al Fleming, Brian Henderson, and Ashutosh Muni for their technical and software assistance. The authors are also grateful to Gurpreet Sidhu, Winnie Ting, Geetanjali Kashyap, and Mamdouh Farag for their help in initial experimental set-up, and data collection. All of the experiments conducted complied with the current laws of Canada.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Rammohan V. Maikala
    • 1
  • Sharla King
    • 2
  • Yagesh N. Bhambhani
    • 3
  1. 1.Liberty Mutual Research Institute for SafetyHopkintonUSA
  2. 2.InterProfessional Initiative, Health Sciences CouncilUniversity of AlbertaEdmontonCanada
  3. 3.Faculty of Rehabilitation MedicineUniversity of AlbertaEdmontonCanada

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