CARDIOVASCULAR-RESPONSES TO EXERCISE AS FUNCTIONS OF ABSOLUTE AND RELATIVE WORK LOAD
CARDIOVASCULAR-RESPONSES TO EXERCISE AS FUNCTIONS OF ABSOLUTE AND RELATIVE WORK LOAD
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DOI：
10.1152/jappl.1983.54.5.1314
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发表时间：
1983-01-01
影响因子：
3.3
通讯作者：
BLOMQVIST, CG
中科院分区：
文献类型：
--
作者：
LEWIS, SF;TAYLOR, WF;BLOMQVIST, CG
绝对和相对O2摄取（≥ VO2和肌群特异性≥ VO2max的百分比）作为在更宽范围的活动肌肉质量上对运动的心血管和呼吸反应的决定因素的作用以前没有被定义。六名健康男性在四种不同的相对工作负荷下进行4种类型的动态锻炼（单臂弯曲、单臂曲柄和单腿和双腿骑车），对于相应的肌肉群，为VO2 max的25、50、75和100%。在最大单臂弯曲、单臂曲柄和单腿骑行期间的VO2分别平均为最大双腿骑行期间的VO2的20、50和75%。心输出量与VO2或VO2线性相关，对于每种类型的运动具有相似的斜率和截距。在给定的% ≥ VO2 maX下，活动肌肉质量越大，心率越高。与%. ovrhdot.VO2max相关，全身阻力较低，血浆儿茶酚胺水平较高，活动肌肉质量较大。心血管对运动的反应在很大程度上取决于活动肌肉质量和绝对O2摄取，其主要特征似乎是全身O2运输和利用之间的紧密联系。
The roles of absolute and relative O2 uptake (.ovrhdot.VO2 and percent of muscle group specific .ovrhdot.VO2 max) as determinants of the cardiovascular and ventilatory responses to exercise over a wider range of active muscle mass have not previously been defined. Six healthy men performed 4 types of dynamic exercise (1-arm curl, 1-arm cranking, and 1 and 2-leg cycling) at four different relative work loads, 25, 50, 75 and 100% of .ovrhdot.VO2 max, for the corresponding muscle group. .ovrhdot.VO2 during maximal 1-arm curl, 1-arm cranking and 1-leg cycling averaged 20, 50 and 75%, respectively, of that for maximal 2-leg cycling. Cardiac output was linearly related to .ovrhdot.VO2 with a similar slope and intercept for each type of exercise. Heart rate at a given %.ovrhdot.VO2 maX was higher with larger active muscle mass. In relation to %.ovrhdot.VO2 max, systemic resistance was lower and plasma catecholamine levels were higher with larger active muscle mass. The cardiovascular responses to exercise are determined to a large extent by the active muscle mass and the absolute O2 uptake, with the principal feature appearing to be the tight linkage between systemic O2 transport and utilization.