Leg oxygen uptake in the initial phase of intense exercise is slowed by a marked 1 reduction in oxygen delivery
نویسندگان
چکیده
Peter M. Christensen , Michael Nyberg, Stefan P. Mortensen, Jens Jung Nielsen, Niels H. Secher, Rasmus 3 Damsgaard, Ylva Hellsten, Jens Bangsbo 4 1 Department of Nutrition, Exercise and Sports, Section of Integrated Physiology, University of Copenhagen, Denmark 5 2 Team Danmark (Danish elite sport organization), Copenhagen, Denmark 6 3 The Copenhagen Muscle Research Center, Rigshospitalet, Copenhagen, Denmark 7 4 The Copenhagen Muscle Research Center, Department of Anesthesia, Rigshospitaliet, University of Copenhagen, 8 Denmark 9
منابع مشابه
Leg oxygen uptake in the initial phase of intense exercise is slowed by a marked reduction in oxygen delivery.
The present study examined whether a marked reduction in oxygen delivery, unlike findings in moderate-intensity exercise, would slow leg oxygen uptake (Vo2) kinetics during intense exercise (86 ± 3% of incremental test peak power). Seven healthy males (26 ± 1 years, means ± SE) performed one-legged knee-extensor exercise (60 ± 3 W) for 4 min in a control setting (CON) and with arterial infusion...
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The effect of low blood flow at onset of moderate-intensity exercise on the rate of rise in muscle oxygen uptake was examined. Seven male subjects performed a 3.5-min one-legged knee-extensor exercise bout (24 +/- 1 W, mean +/- SD) without (Con) and with (double blockade; DB) arterial infusion of inhibitors of nitric oxide synthase (N(G)-monomethyl-l-arginine) and cyclooxygenase (indomethacin) ...
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In response to hypoxic breathing most studies report slower pulmonary oxygen uptake (Vo2) kinetics at the onset of exercise, but it is not known if this relates to an actual slowing of the Vo2 in the active muscles(.) The aim of the present study was to evaluate whether thigh Vo2 is slowed at the onset of intense exercise during acute exposure to hypoxia. Six healthy male subjects (25.8 ± 1.4 y...
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The present study examined the onset and the rate of rise of muscle oxidation during intense exercise in humans and whether oxygen availability limits muscle oxygen uptake in the initial phase of intense exercise. Six subjects performed 3 min of intense one-legged knee-extensor exercise [65.3 +/- 3.7 (means +/- SE) W]. The femoral arteriovenous blood mean transit time (MTT) and time from femora...
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