منابع مشابه
O2 uptake kinetics during exercise at peak O2 uptake.
Compared with moderate- and heavy-intensity exercise, the adjustment of O2 uptake (VO2) to exercise intensities that elicit peak VO2 has received relatively little attention. This study examined the VO2 response of 21 young, healthy subjects (25 +/- 6 yr; mean +/- SD) during cycle ergometer exercise to step transitions in work rate (WR) corresponding to 90, 100, and 110% of the peak WR achieved...
متن کاملPrior exercise speeds pulmonary O2 uptake kinetics by increases in both local muscle O2 availability and O2 utilization.
The effect of prior exercise on pulmonary O(2) uptake (Vo(2)(p)), leg blood flow (LBF), and muscle deoxygenation at the onset of heavy-intensity alternate-leg knee-extension (KE) exercise was examined. Seven subjects [27 (5) yr; mean (SD)] performed step transitions (n = 3; 8 min) from passive KE following no warm-up (HVY 1) and heavy-intensity (Delta50%, 8 min; HVY 2) KE exercise. Vo(2)(p) was...
متن کاملPeripheral O2 diffusion does not affect V(O2)on-kinetics in isolated insitu canine muscle.
To test the hypothesis that muscle O2 uptake (V(O2)) on-kinetics is limited, at least in part, by peripheral O2 diffusion, we determined the V(O2) on-kinetics in 1) normoxia (Control); 2) hyperoxic gas breathing (Hyperoxia); and 3) hyperoxia and the administration of a drug (RSR-13, Allos Therapeutics), which right-shifts the Hb-O2 dissociation curve (Hyperoxia+RSR-13). The study was conducted ...
متن کاملFound in translation: the dependence of oxygen uptake kinetics on O2 delivery and O2 utilization.
THAT THE RATE of pulmonary oxygen uptake (V̇O2) does not immediately increase in response to a step increase in work rate, resulting in the so-called “oxygen deficit,” is one of the oldest and most controversial observations in exercise physiology. Relatively little controversy emanates from the description of the V̇O2 kinetics: that the “fast” or “primary” component is exponential in character, ...
متن کامل'Priming' exercise and O2 uptake kinetics during treadmill running.
We tested the hypothesis that priming exercise would speed V(O2) kinetics during treadmill running. Eight subjects completed a square-wave protocol, involving two bouts of treadmill running at 70% of the difference between the running speeds at lactate threshold (LT) and V(O2) max, separated by 6-min of walking at 4 km h(-1), on two occasions. Oxygen uptake was measured breath-by-breath and sub...
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ژورنال
عنوان ژورنال: Circulation Journal
سال: 2009
ISSN: 1346-9843,1347-4820
DOI: 10.1253/circj.cj-09-0585