PMID: 11606011Oct 19, 2001Paper

Vastus medialis muscle oxygenation trends during a simulated 20-km cycle time trial

European Journal of Applied Physiology
J P NearyYagesh Bhambhani

Abstract

In this study we examined the oxygenation trend of the vastus medialis muscle during sustained high-intensity exercise. Ten cyclists performed an incremental cycle ergometer test to voluntary exhaustion [mean (SD) maximum oxygen uptake 4.29 (0.63) l x min(-1); relative to body mass 60.8 (2.4) ml x kg(-1)min(-1)] and a simulated 20-km time trial (20TT) on a wind-loaded roller system using their own bicycle (group time = 23-31 min) in two separate sessions. Cardiorespiratory responses were monitored using an automated metabolic cart and a wireless heart rate monitor. Tissue absorbency, which was used as an index of muscle oxygenation, was recorded simultaneously from the vastus medialis using near-infrared spectroscopy. Group mean values for oxygen uptake, ventilation, heart rate, respiratory exchange ratio, power output, and rating of perceived exhaustion were significantly (P < or = 0.05) higher during the incremental test compared to the 20TT [4.29 (0.63) l x min(-1) vs 4.01 (0.55) l x min(-1), 120.4 (26) l x min(-1) vs 97.6 (16.1) l x min(-1), 195 (8) beats x min(-1) vs 177 (9) beats min(-1), 1.15 (0.06) vs 0.93 (0.06), 330.1 (31) W vs 307.2 (24.5) W, and 19 (1.5) vs 16 (1.7), respectively]. Oxygen uptake and heart rate durin...Continue Reading

Citations

Jun 1, 2012·European Journal of Applied Physiology·Julien D PériardValentina Quaresima
Aug 9, 2003·Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée·J Patrick NearyDonald C McKenzie
Aug 27, 2004·Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée·J Patrick Neary
May 19, 2007·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Satoshi MurakiGlen Macartney Davis
Mar 26, 2005·Dynamic Medicine : DM·J Patrick NearyYagesh N Bhambhani
Jul 5, 2006·Dynamic Medicine : DM·Michael D KennedyDarren E R Warburton
Apr 11, 2006·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Kotaro KawaguchiYagesh Bhambhani
Apr 14, 2007·Journal of Applied Physiology·Andrew W SubudhiRobert C Roach
Dec 15, 2015·Medicine and Science in Sports and Exercise·Julien D Périard, Sébastien Racinais
Nov 20, 2002·Medicine and Science in Sports and Exercise·J Patrick NearyYagesh N Bhambhani

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