An integrative view of limitations to muscular performance

First we describe the changing site of limitation to maximal O2 transport with increasing fitness in mammals. The capacity for diffusion and airway/parenchymal flow rate and volume are markedly overbuilt in the sedentary subject's lung, but undergo little change with increased training/fitness;...

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Vydané v:Advances in experimental medicine and biology Ročník 384; s. 393
Hlavní autori: Dempsey, J A, Babcock, M A
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: United States 1995
Predmet:
Exercise - physiology
Humans
Muscle Contraction - physiology
Muscle Fatigue - physiology
Muscles - metabolism
Oxygen - metabolism
ISSN:0065-2598
On-line prístup:Zistit podrobnosti o prístupe
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Shrnutí:First we describe the changing site of limitation to maximal O2 transport with increasing fitness in mammals. The capacity for diffusion and airway/parenchymal flow rate and volume are markedly overbuilt in the sedentary subject's lung, but undergo little change with increased training/fitness; accordingly, as demand for O2 transport increases in the highly fit, the limits for maximal diffusion and ventilation are surpassed or met at maximal exercise. Secondly, low-frequency diaphragmatic fatigue occurred with by heavy endurance exercise. This fatigue resulted from increased diaphragmatic work together with the major contribution from the secondary effects of increased locomotor muscle activity; namely, metabolic acidosis and increased requirement for blood flow.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
ObjectType-Review-3
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ISSN:0065-2598
DOI:10.1007/978-1-4899-1016-5_31