Mahon A D, Gay J A, Stolen K Q
Human Performance Laboratory, Ball State University, Muncie, Indiana 47306, USA.
Eur J Appl Physiol Occup Physiol. 1998 Jul;78(2):115-20. doi: 10.1007/s004210050395.
The purpose of this study was to examine overall, leg and chest ratings of perceived exertion (RPE) at ventilatory threshold (Thvent) in 16 children (mean age 10.9 years) and 17 adults (mean age 24.3 years). Thvent and maximum oxygen consumption (VO2max) were measured during a graded exercise test on a cycle ergometer. Overall, leg and chest RPE were obtained at the end of each exercise stage. VO2max was 49.9 (8.5) and 47.1 (6.1) ml x kg(-1) x min(-1) [mean (SD)] in the adults and children, respectively (P > 0.05). Relative to VO2max, Thvent was 61.7 (5.3)% in the adults and 64.7 (5.2)% in the children (P > 0.05). Overall, leg, and chest RPE values at Thvent for the adults were 11.5 (2.6), 11.9 (2.5), and 10.5 (2.5), while for the children these values were 13.6 (2.2), 14.1 (2.2), and 12.6 (2.3), respectively. All RPE values were higher for the children (P < 0.05). These results suggest that children are able to discriminate levels of exertion in different parts of their body during graded exercise. Furthermore, children rate an intensity corresponding to Thvent to require a greater overall, leg and chest effort than adults exercising at a similar intensity. This indicates that children experience more pronounced cardiorespiratory and muscular sensations during this type of exercise.
本研究旨在检测16名儿童（平均年龄10.9岁）和17名成年人（平均年龄24.3岁）在通气阈值（Thvent）时的总体、腿部和胸部自觉用力程度（RPE）。在使用自行车测力计进行的分级运动试验中测量Thvent和最大耗氧量（VO2max）。在每个运动阶段结束时获取总体、腿部和胸部的RPE。成年人和儿童的VO2max分别为49.9（8.5）和47.1（6.1）ml·kg⁻¹·min⁻¹[平均值（标准差）]（P>0.05）。相对于VO2max，成年人的Thvent为61.7（5.3）%，儿童为64.7（5.2）%（P>0.05）。成年人在Thvent时的总体、腿部和胸部RPE值分别为11.5（2.6）、11.9（2.5）和10.5（2.5），而儿童的这些值分别为13.6（2.2）、14.1（2.2）和12.6（2.3）。儿童的所有RPE值均较高（P<0.05）。这些结果表明，儿童在分级运动过程中能够区分身体不同部位的用力程度。此外，与以相似强度运动的成年人相比，儿童将与Thvent相对应的强度评定为需要更大的总体、腿部和胸部用力。这表明儿童在这类运动中会经历更明显的心肺和肌肉感觉。
