Durant R H, Baranowski T, Davis H, Rhodes T, Thompson W O, Greaves K A, Puhl J
Department of Pediatrics, Medical College of Georgia, Augusta 30912.
Med Sci Sports Exerc. 1993 Mar;25(3):389-95.
We describe the daily heart-rate patterns and the between-day and within-day reliabilities of several heart rate indicators measured in 131 Anglo-, African-, and Mexican-American children aged 5-7 yr. Heart rates were measured over 12 waking hours with a Quantum XL Telemetry heart rate monitor. The percent of heart rates 25% above resting heart rate, an index of physical activity heart rate (PAHR-25 index), was found to have the highest within-day (0.92) and between-day (0.81) reliabilities. The Spearman-Brown prophecy formula indicated that only 9.3 h of observation would be needed to maintain a within-day reliability of 0.90. The percentage of heart rates 50% above resting heart rate (PAHR-50) was found to have slightly lower within-day (0.88) and between-day (0.56) reliability. Principal components analysis revealed that the PAHR-25 and PAHR-50 indicies only had one component throughout the day. The PAHR-25 and PAHR-50 indicies were weakly correlated with age, suggesting that they may be good indicators of relative PAHR. Male children had higher (P < or = 0.025) PAHR-25 index scores than females. There were no gender or ethnic differences in the PAHR-50 index.
我们描述了131名年龄在5至7岁的英裔、非裔和墨西哥裔美国儿童的每日心率模式以及几种心率指标在日间和日内的可靠性。使用Quantum XL遥测心率监测仪在12个清醒小时内测量心率。发现高于静息心率25%的心率百分比，即身体活动心率指数（PAHR - 25指数），具有最高的日内（0.92）和日间（0.81）可靠性。斯皮尔曼 - 布朗预测公式表明，仅需9.3小时的观察就能维持0.90的日内可靠性。高于静息心率50%的心率百分比（PAHR - 50）的日内（0.88）和日间（0.56）可靠性略低。主成分分析显示，PAHR - 25和PAHR - 50指数在一整天中仅具有一个成分。PAHR - 25和PAHR - 50指数与年龄弱相关，表明它们可能是相对身体活动心率的良好指标。男童的PAHR - 25指数得分高于女童（P≤0.025）。PAHR - 50指数在性别或种族方面没有差异。
