Interaction of factors determining oxygen uptake at the onset of exercise.
Interaction of factors determining oxygen uptake at the onset of exercise.
复制标题
决定运动开始时摄氧量的因素的相互作用。
DOI:
10.1152/jappl.1999.86.4.1101
复制
发表时间:
1999
影响因子:
3.3
通讯作者:
R. Hughson
中科院分区:
文献类型:
--
作者:
M. Tschakovsky;R. Hughson
Considerable debate surrounds the issue of whether the rate of adaptation of skeletal muscle O2 consumption (QO2) at the onset of exercise is limited by 1) the inertia of intrinsic cellular metabolic signals and enzyme activation or 2) the availability of O2 to the mitochondria, as determined by an extrinsic inertia of convective and diffusive O2 transport mechanisms. This review critically examines evidence for both hypotheses and clarifies important limitations in the experimental and theoretical approaches to this issue. A review of biochemical evidence suggests that a given respiratory rate is a function of the net drive of phosphorylation potential and redox potential and cellular mitochondrial PO2 (PmitoO2). Changes in both phosphorylation and redox potential are determined by intrinsic metabolic inertia. PmitoO2 is determined by the extrinsic inertia of both convective and diffusive O2 transport mechanisms during the adaptation to exercise and the rate of mitochondrial O2 utilization. In a number of exercise conditions, PmitoO2 appears to be within a range capable of modulating muscle metabolism. Within this context, adjustments in the phosphate energy state of the cell would serve as a cytosolic "transducer," linking ATP consumption with mitochondrial ATP production and, therefore, O2 consumption. The availability of reducing equivalents and O2 would modulate the rate of adaptation of QO2.
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DOI:
10.1152/ajpcell.1990.258.6.c995
发表时间:
1990
期刊:
The American journal of physiology
影响因子:
--
作者:
Funk,CI;ClarkJr,A;Connett,RJ
通讯作者:
Connett,RJ
影响因子:
15.9
作者:
RICHARDSON, RS;NOYSZEWSKI, EA;WAGNER, PD
通讯作者:
WAGNER, PD
DOI:
10.1152/ajpheart.1993.265.5.h1682
发表时间:
1993
期刊:
The American journal of physiology
影响因子:
--
作者:
Sarelius,IH
通讯作者:
Sarelius,IH
影响因子:
4.1
作者:
Meyer,RA;Foley,JM
通讯作者:
Foley,JM
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Wilson,DF;Rumsey,WL;Green,TJ;Vanderkooi,JM
通讯作者:
Vanderkooi,JM