Ueda T, Kurokawa T
Hiroshima University, Faculty of Curriculum and Instruction, Department of Health and Physical Education, Japan.
Eur J Appl Physiol Occup Physiol. 1991;63(3-4):200-4. doi: 10.1007/BF00233848.
The purpose of this study was to investigate the validity of heart rate (fc) and ratings of perceived exertion (RPE) as indices of exercise intensity in a group of children while swimming. Six healthy male swimmers, aged 10-12, swam tethered using the breast-stroke in a flume. The resistance started at 1.0 kg and increased in 1.0 kg steps up to the point of their exhaustion. The subjects swam for 5 min during each period, with a rest of 10-20 min until they had returned to their resting fc level. The last exercise intensity was with the maximal mass the subjects could support for 2 min. The last min of oxygen consumption (VO2) and 30 s of fc were measured during each exercise period. The subjects gave their RPE assessment at the end of exercise. The individual relationships between fc and VO2, and percentage maximal oxygen consumption (%VO2max) were linear with a high correlation r = 0.962-0.996 and r = 0.962-0.996, respectively. Therefore, it was concluded that fc was valid as an index of the exercise intensity of children while swimming. Compared to the results found in adults using a similar protocol, the children's fc were 8.3-26.9 beats.min-1 higher than those of the adults at the given %VO2max. The present study showed two different patterns in the relationship between VO2 and RPE in individuals. In two subjects the RPE increased linearly with VO2 while in the other four subjects the increase was discontinuous. If fc and RPE were to be applied to the setting and evaluation of exercise intensity during swimming, it would seem that fc would be a more useful guide than RPE for some children.
本研究的目的是调查心率（fc）和主观用力程度分级（RPE）作为一组儿童游泳时运动强度指标的有效性。六名年龄在10至12岁的健康男性游泳者在水槽中使用蛙泳进行系绳游泳。阻力从1.0千克开始，以1.0千克的步长增加，直至他们筋疲力尽。受试者在每个时间段游泳5分钟，休息10至20分钟，直到他们的心率恢复到静息fc水平。最后一次运动强度是受试者能够支撑2分钟的最大重量。在每个运动时间段测量最后一分钟的耗氧量（VO2）和30秒的fc。受试者在运动结束时给出他们的RPE评估。fc与VO2以及最大耗氧量百分比（%VO2max）之间的个体关系呈线性，相关性较高，r分别为0.962 - 0.996和0.962 - 0.996。因此，得出结论，fc作为儿童游泳时运动强度的指标是有效的。与使用类似方案在成年人中发现的结果相比，在给定的%VO2max时，儿童的fc比成年人高8.3 - 26.9次/分钟。本研究显示了个体中VO2与RPE之间关系的两种不同模式。在两名受试者中，RPE随VO2呈线性增加，而在其他四名受试者中，增加是不连续的。如果要将fc和RPE应用于游泳时运动强度的设定和评估，对于一些儿童来说，fc似乎比RPE更有用。
