Rowland T W, Green G M
Department of Pediatrics, Baystate Medical Center, Springfield, Massachusetts.
Pediatr Cardiol. 1989 Spring;10(2):75-9. doi: 10.1007/BF02309918.
The capability of children to respond to endurance training with increased aerobic capacity is unclear. Prepubertal subjects may require higher target heart rates than adults to increase VO2 max, and previous studies failing to demonstrate aerobic trainability in children may have involved inadequate exercise intensity. In this study, heart rates at the anaerobic threshold, measured noninvasively as the ventilatory breakpoint (VBP), were determined during treadmill testing of 12 premenarchal girls to establish a metabolic-based target rate. The mean heart rate at VBP was 171 beats/min (+/- 12 SD) with a range from 147 to 194 beats/min. Although a wide intersubject variability was observed, the rates at VBP exceeded those predicted by standard formulas for calculating target heart rates in adults by over 10 beats/min in a majority of the girls. These data indicated that target heart rate guidelines designed for training older individuals may not adequately stress oxygen delivery systems in prepubertal subjects.
儿童通过耐力训练提高有氧能力的能力尚不清楚。青春期前的受试者可能比成年人需要更高的目标心率来提高最大摄氧量，而先前未能证明儿童有氧训练能力的研究可能涉及运动强度不足。在本研究中，通过对12名月经初潮前女孩进行跑步机测试，以无创方式将通气断点（VBP）作为无氧阈值来测定心率，从而确定基于代谢的目标心率。VBP时的平均心率为171次/分钟（±12标准差），范围为147至194次/分钟。尽管观察到受试者间存在很大差异，但在大多数女孩中，VBP时的心率比计算成年人目标心率的标准公式预测值高出10次/分钟以上。这些数据表明，为训练年龄较大个体设计的目标心率指南可能无法充分刺激青春期前受试者的氧输送系统。
