Rowlands A V, Eston R G, Ingledew D K
School of Sport, Health, and Physical Education Sciences, University of Wales, Bangor LL57 2EN, Wales, United Kingdom.
J Appl Physiol (1985). 1999 Apr;86(4):1428-35. doi: 10.1152/jappl.1999.86.4.1428.
The relationships between children's activity, aerobic fitness, and fatness are unclear. Indirect estimates of activity, e.g., heart rate (HR) and recall, may mask any associations. The purpose of this study was to assess these relationships by using the Tritrac-R3D, a pedometer, and heart rate. Thirty-four children, ages 8-10 yr, participated in the study. The Tritrac and pedometer were worn for up to 6 days. HR was measured for 1 day. Activity measured by Tritrac or pedometer correlated positively to fitness in the whole group (Tritrac, r = 0.66; pedometer, r = 0.59; P < 0.01) and in boys and girls separately (P < 0.05) and correlated negatively to fatness in the whole group (r = -0.42, P < 0.05). In contrast, HR did not correlate significantly to fitness, and HR of >139 beats/min correlated positively to fatness in girls (r = 0.64, P < 0.05). This suggests that HR is misleading as a measure of activity. This study supports a positive relationship between activity and fitness and suggests a negative relationship between fatness and activity.
儿童的活动、有氧适能和肥胖之间的关系尚不清楚。对活动的间接估计，如心率（HR）和回忆法，可能会掩盖任何关联。本研究的目的是通过使用Tritrac-R3D（一种计步器）和心率来评估这些关系。34名8至10岁的儿童参与了该研究。Tritrac和计步器佩戴长达6天。心率测量1天。通过Tritrac或计步器测量的活动与全组的适能呈正相关（Tritrac，r = 0.66；计步器，r = 0.59；P < 0.01），在男孩和女孩中分别呈正相关（P < 0.05），且与全组的肥胖呈负相关（r = -0.42，P < 0.05）。相比之下，心率与适能无显著相关性，心率>139次/分钟与女孩的肥胖呈正相关（r = 0.64，P < 0.05）。这表明心率作为活动量的衡量指标具有误导性。本研究支持活动与适能之间存在正相关关系，并表明肥胖与活动之间存在负相关关系。
