Physiologic Responses to Treadmill Running in Adult and Prepubertal Males
Physiologic Responses to Treadmill Running in Adult and Prepubertal Males
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成年和青春期前男性对跑步机跑步的生理反应
DOI：
10.1055/s-2008-1025672
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发表时间：
1987
影响因子：
2.5
通讯作者：
Gerald M. Green
中科院分区：
文献类型：
--
作者：
T. Rowland;Auchinachie Ja;Keenan Tj;Gerald M. Green
直接比较儿童和成人对耐力运动的生理反应的数据很少。为了评估最大和次最大跑步机运动过程中与年龄相关的差异，将20名活跃的青春期前男孩（年龄9-13岁）在测试过程中记录的生理参数与23-33岁非运动成年男性的生理参数进行了比较。最大耗氧量（VO 2 max）男孩为57.9 ml.kg-1.min-1（6.9 SD），成人为48.3 ml.kg-1.min-1（4.9 SD）。运行经济检查VO 2在9.6公里/小时的跑步机速度和VO 2在四个次最大速度的线性回归的斜率是男孩相比，男性时，表示每公斤体重的值。然而，当与体表面积相关时，两组之间跑步经济性的差异消失了。正如预期的那样，儿童在给定的跑步机速度下有更高的步频，但两组儿童的跑步步频与经济无关。在最大和次最大运动的儿童，这可能反映了减少无氧能力或底物利用的差异，观察到较低的呼吸交换率。这些结果证实了以前在儿童中观察到的高有氧能力，并表明年轻受试者的跑步经济性较低，可能在很大程度上与更大的体表面积/质量比有关。
Little data are available directly comparing physiologic responses to endurance exercise in children and adults. To evaluate age related differences during maximal and submaximal treadmill exercise, physiologic parameters recorded during testing of 20 active prepubertal boys (aged 9-13 years) were compared with values obtained in nonathletic adult males aged 23-33 years. Maximum oxygen consumption (VO2 max) was 57.9 ml.kg-1.min-1 (6.9 SD) in the boys and 48.3 ml.kg-1.min-1 (4.9 SD) in the adults. Running economy examined both as VO2 at a treadmill speed of 9.6 kph and as the slope of linear regression of VO2 at four submaximal speeds was less in boys compared to men when values were expressed per kg body mass. Differences in running economy between the two groups disappeared, however, when related to body surface area. As expected, children had a higher stride frequency at a given treadmill speed, but running stride frequency was unrelated to economy with the two groups. Lower respiratory exchange ratios were observed at maximal and submaximal exercise in the children, which may reflect diminished anaerobic capacity or differences in substrate utilization. These results substantiate the high aerobic capacity previously observed in children and suggest that lower running economy in younger subjects may largely relate to a greater body surface are/mass ratio.