儿童心率能量消耗：校准技术评估

Energy expenditure by heart rate in children: an evaluation of calibration techniques.

作者信息

Livingstone M B, Robson P J, Totton M

机构信息

Northern Ireland Centre for Diet and Health, University of Ulster, Coleraine, Co. Londonderry.

出版信息

Med Sci Sports Exerc. 2000 Aug;32(8):1513-9. doi: 10.1097/00005768-200008000-00022.

DOI:10.1097/00005768-200008000-00022

PMID:10949020

Abstract

PURPOSE

To evaluate the impact of applying seven calibration equations (CE) in the estimation of free-living total energy expenditure (TEE) over 2-3 d in seven boys (mean +/- SD age 9.4+/-0.4 yr) by the Flex heart rate (HR) method.

METHODS

HR and oxygen consumption were measured simultaneously for eight activities (lying, sitting, standing, arm-reaching exercise, a stooping-and-twisting exercise, stepping, treadmill walking/running, and cycle ergometry) carried out in sequence. CE were derived from various combinations of activities. Flex HRs were identified for each CE.

RESULTS

There were no significant differences in TEE estimates [range (mean +/- SD); 6.65+/-0.72 to 7.27+/-0.89 MJ x d(-1)] derived from any of the CE. Mean daytime HR ranged from 86+/-4 to 122+/-15 beats x min(-1), and 82-98% of recorded daytime HR was < or = 140 beats x min(-1). As a result, within-subject CV in TEE from each of the CE ranged from 2.2% to 8.9%. Mean between-subject Flex HR ranged from 94+/-8 to 111+/-8 beats x min(-1). No significant differences were observed in corresponding TEE estimates. However, mean activity energy expenditure (AEE) ranged from 2.10+/-1.18 MJ x d(-1) (based on Flex HR 111+/-8 beats-min(-1)) to 3.55+/-1.44 MJ x d(-1) (based on Flex HR 94+/-8 beats x min(-1); NS). The corresponding estimates of resting energy expenditure (REE) were 1.89+/-0.82 MJ x d(-1) (Flex HR 111+/-8 beats-min(-1)) and 1.05+/-0.60 MJ x d(-1) (Flex HR 94+/-8 beats x min(-1)). Only the differences between the minimum and maximum estimates of REE were significant (P < 0.05).

CONCLUSIONS

Unduly lengthy and complex calibration procedures for the estimation of Flex HR TEE may not be justified in most cases, particularly in sedentary children.

摘要

目的

通过Flex心率（HR）法评估应用7种校准方程（CE）对7名男孩（平均±标准差年龄9.4±0.4岁）2 - 3天自由生活总能量消耗（TEE）估计值的影响。

方法

依次对8种活动（躺、坐、站、伸手运动、弯腰扭转运动、踏步、跑步机行走/跑步和自行车测力计运动）同时测量HR和耗氧量。CE由活动的各种组合得出。为每个CE确定Flex HR。

结果

源自任何CE的TEE估计值[范围（平均±标准差）；6.65±0.72至7.27±0.89 MJ×d⁻¹]无显著差异。白天平均HR范围为86±4至122±15次/分钟，记录的白天HR的82 - 98%≤140次/分钟。因此，每个CE的TEE受试者内变异系数范围为2.2%至8.9%。受试者间平均Flex HR范围为94±8至111±8次/分钟。相应的TEE估计值未观察到显著差异。然而，平均活动能量消耗（AEE）范围为2.10±1.18 MJ×d⁻¹（基于Flex HR 111±8次/分钟）至3.55±1.44 MJ×d⁻¹（基于Flex HR 94±8次/分钟；无显著性差异）。相应的静息能量消耗（REE）估计值为1.89±0.82 MJ×d⁻¹（Flex HR 111±8次/分钟）和1.05±0.60 MJ×d⁻¹（Flex HR 94±8次/分钟）。仅REE的最小值和最大值估计值之间的差异具有显著性（P < 0.05）。