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The aim of this study was to clarify exercise-induced vasodilation by comparing the changes in muscle oxygenation during constant-work exercise (CWE) between untrained and endurance-trained individuals using time-resolved near-infrared spectroscopy (TR-NIRS). Ten healthy young untrained and 9 endurance-trained individuals performed CWE at moderate and high intensities each for 6 minutes. Muscle oxy/deoxygenation in the vastus lateralis was continuously monitored by TR-NIRS. Our results have demonstrated that endurance-trained individuals with high aerobic capacities showed increased muscle oxygenation during CWE, leading to higher exercise tolerance function. Thus, TR-NIRS can provide an optimal exercise training intensity for athletes to improve aerobic capacity.
Tasuki Endo,Rotaro Kime,Riki Tanaka,Sayuri Fuse,Miyuki Kuroiwa,Yuko Kurosawa, andTakafumi Hamaoka
"Greater muscle oxygenation during moderate-intensity constant-work exercise in endurance athletes", Proc. SPIE PC11956, Biophotonics in Exercise Science, Sports Medicine, Health Monitoring Technologies, and Wearables III, PC1195609 (7 March 2022); https://doi.org/10.1117/12.2608363
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