Comparison of muscle O 2 dynamics at different sites of the forearm flexor muscles during incremental handgrip exercise


Conference Paper

This study investigated heterogeneity of muscle O2 consumption (diffusive m-VO2) and muscle oxygenation difference (m-O2 difference) within the forearm flexor muscles using multi-optical fibers near-infrared continuous wave spectroscopy (NIRcws) during incremental exercise. Nine healthy male subjects performed incremental dynamic handgrip exercise until exhaustion. The workload was increased by 5% maximal voluntary contraction (MVC) every 1 min, starting at 10% MVC. The NIRcws probes (10 channels) were placed on the right forearm flexor muscles to monitor muscle oxygenation. The diffusive m-VO2 and the m-O2 difference were evaluated at each exercise stage. The diffusive m-VO2 at the medial site was significantly greater than the lateral site at 25% MVC (p < 0.05). Similarly, m-O2 difference at the medial site increased significantly over the lateral site (p < 0.05), whereas there were no significant differences in diffusive m-VO2 or m-O2 difference between the proximal and distal sites. These results in forearm muscle were different from the previous study which found that there were longitudinal differences in muscle VO2 in the femoral muscle. © Springer Science+Business Media, LLC 2010.

Full Text

Duke Authors

Cited Authors

  • Fujioka, M; Kime, R; Koga, S; Osawa, T; Shimomura, K; Osada, T; Murase, N; Katsumura, T

Published Date

  • December 1, 2010

Published In

Volume / Issue

  • 662 /

Start / End Page

  • 359 - 364

International Standard Serial Number (ISSN)

  • 0065-2598

International Standard Book Number 13 (ISBN-13)

  • 9781441912398

Digital Object Identifier (DOI)

  • 10.1007/978-1-4419-1241-1_52

Citation Source

  • Scopus