Regional differences in blood flow and oxygen consumption in resting muscle and their relationship during recovery from exhaustive exercise.
Regional differences in blood flow and oxygen consumption in resting muscle and their relationship during recovery from exhaustive exercise.
复制标题
静息肌肉中血流量和耗氧量的区域差异及其在力竭运动恢复过程中的关系。
DOI：
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发表时间：
2003
影响因子：
3.3
通讯作者：
I. Muraoka
中科院分区：
文献类型：
--
作者：
M. Mizuno;Y. Kimura;T. Iwakawa;K. Oda;K. Ishii;K. Ishiwata;Yoshio Nakamura;I. Muraoka
本研究旨在探讨力竭运动后恢复期肌肉血流量和耗氧量的区域性差异及其相互关系。五名健康男性进行了详尽的单腿自行车运动。使用正电子发射断层扫描测量运动前后股四头肌的血流量、摄氧量和氧提取量。感兴趣区域包括肌肉的五个区域（两个近端、一个中央和两个远端），这些区域在肌肉上均匀分布。运动前血流量和耗氧量明显下降（P < 0.05）近端向远端方向;血流量从2.0 +/- 0.5下降到1.4 +/- 0.3 ml x 100 g-1 x min-1，耗氧量从0.21 +/-0.04降至0.17 +/-0.02 mL. 100 g-1 × min-1。与此相反，这些梯度的血流和氧气消耗减少运动后恢复。因此，运动后恢复期肌肉血流量变化与耗氧量变化呈正相关（r = 0.963，P < 0.01）。从近端到远端，这些变化变得更大：血流量从2.9 +/- 0.7增加到3.9 +/- 0.8，氧耗量从1.4 +/- 0.1增加到1.8 +/- 0.4倍静息值。这些结果表明，血流动力学变量是异质性的肌肉在休息和恢复期间从运动中，有一个系统的差异，这些变量的方向从近端到远端区域内的股四头肌肌肉。
This investigation evaluated regional differences in blood flow and oxygen consumption and their relationship in exercised muscle during recovery from exhaustive exercise. Five healthy men performed exhaustive one-legged cycling exercise. Positron emission tomography was used to measure blood flow, oxygen uptake, and oxygen extraction in the quadriceps femoris muscle before and after exercise. Regions of interest included five areas of the muscle (two proximal, one central, and two distal), which were evenly spaced across the muscle. Before exercise, blood flow and oxygen consumption decreased significantly (P < 0.05) in the direction from the proximal to the distal portions; blood flow declined from 2.0 +/- 0.5 to 1.4 +/- 0.3 ml x 100 g-1 x min-1, and oxygen consumption decreased from 0.21 +/- 0.04 to 0.17 +/- 0.02 ml.100 g-1x min-1. In contrast, these gradients in blood flow and oxygen consumption diminished during recovery after exercise. Consequently, there was a positive relationship between changes in blood flow and oxygen consumption in an exercised muscle during recovery after exercise (r = 0.963, P < 0.01). These changes became larger in the direction from proximal to distal portions: blood flow increased from 2.9 +/- 0.7 to 3.9 +/- 0.8 and oxygen consumption from 1.4 +/- 0.1 to 1.8 +/- 0.4 times resting values. These results suggest that hemodynamic variables are heterogeneous within a muscle both at rest and during recovery from exercise and that there is a systematic difference in these variables in the direction from proximal to distal regions within the quadriceps femoris muscle.
静息仓鼠肌肉的体外 O2 吸收和组织化学纤维类型。
DOI：
10.1152/jappl.1984.57.1.246
发表时间：
1984
期刊：
Journal of applied physiology: respiratory, environmental and exercise physiology
影响因子：
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作者：
Sullivan,SM;Pittman,RN
通讯作者：
Pittman,RN