1 January 2010 Comparisons of muscle oxygenation changes between arm and leg muscles during incremental rowing exercise with near-infrared spectroscopy
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Abstract
Our purpose is to compare the changes in muscle oxygenation in the vastus lateralis (VL) and biceps brachii (BB) muscles simultaneously using near-infrared spectroscopy (NIRS) during incremental rowing exercise in eight rowers. Based on the BB and VL muscle oxygenation patterns, two points are used to characterize the muscle oxygenation kinetics in both the arm and the leg muscles. The first point is the breaking point (Bp), which refers to an accelerated fall in muscle oxygenation that correlates with the gas exchange threshold (GET). The second point is the leveling-off point (Lo), which suggests the upper limit of O2 extraction. The GET occurred at 63.3±2.4% of maximal oxygen uptake (V-dot O2 max). The Bp appeared at 45.0±3.8% and 55.6±2.4% V-dot O2 max in the BB and VL, respectively. The Lo appeared at 63.6±4.1% and 86.6±1.0% V-dot O2 max in these two muscles, respectively. Both the Bp and the Lo occurred earlier in BB compared with VL. These results suggest that arm muscles have lower oxidative capacity than leg muscles during rowing exercise. The rowers with higher exercise performances showed heavier workloads, as evaluated by Bp and Lo. The monitoring of muscle oxygenation by NIRS in arm and leg muscles during rowing could be a useful guide for evaluation and training.
© (2010) Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhongxing Zhang, Zhongxing Zhang, Bangde Wang, Bangde Wang, Hui Gong, Hui Gong, Guodong Xu, Guodong Xu, Shoko Nioka, Shoko Nioka, Britton Chance, Britton Chance, } "Comparisons of muscle oxygenation changes between arm and leg muscles during incremental rowing exercise with near-infrared spectroscopy," Journal of Biomedical Optics 15(1), 017007 (1 January 2010). https://doi.org/10.1117/1.3309741 . Submission:
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