Exploring Metrics to Express Energy Expenditure of Physical Activity in Youth.
Exploring Metrics to Express Energy Expenditure of Physical Activity in Youth.
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DOI：
10.1371/journal.pone.0130869
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
CDC/NCI/NCCOR Research Group on Energy Expenditure in Children
中科院分区：
文献类型：
--
作者：
McMurray RG;Butte NF;Crouter SE;Trost SG;Pfeiffer KA;Bassett DR;Puyau MR;Berrigan D;Watson KB;Fulton JE;CDC/NCI/NCCOR Research Group on Energy Expenditure in Children
已经使用了多种方法来表达青少年的能量消耗，但对于哪种方法最能标准化各种身体活动中各种年龄和体型的数据，尚未达成共识。这项研究检查了几种表达能量消耗的常见指标，以确定一种指标是否可以用于所有健康儿童。这样的指标可以提高我们进一步推进《青少年体育活动纲要》的能力。对从 5 个地点获得的摄氧量 (VO2) 数据进行了二次分析，其中包括 947 名 5 至 18 岁的儿童，他们从事 14 种不同的活动。静息代谢率 (RMR) 是根据斯科菲尔德方程 [Hum Nutr Clin Nut. 39（补编1），1985年]。计算绝对摄氧量 (ml.min-1)、每公斤体重摄氧量（VO2，单位为 ml.kg-1.min-1）、净摄氧量（VO2 – 静息代谢率）、异速摄氧量（VO2，单位为 ml.kg-0.75.min-1）和 YOUTH-MET (VO2.[静息 VO2] -1)。这些指标随着年龄、性别、身高和体重进行回归。净摄氧量和异速摄氧量以及青年代谢率与年龄、性别和身体特征的相关性最小。对于中等至剧烈强度的活动，异速生长与年龄和性别的相关性最小。对于久坐和低强度活动，YOUTH-MET 与年龄和性别的相关性最小。没有任何能量消耗指标可以完全消除年龄、身体特征和性别的影响。成人 MET 始终高估 EE。 YOUTH-MET 更适合表达久坐和轻度活动的能量消耗，而异速生长更适合中等和剧烈强度的活动。从实践的角度来看，YOUTH-MET可能是改进《青少年体育活动纲要》的更可行的指标。
Several approaches have been used to express energy expenditure in youth, but no consensus exists as to which best normalizes data for the wide range of ages and body sizes across a range of physical activities. This study examined several common metrics for expressing energy expenditure to determine whether one metric can be used for all healthy children. Such a metric could improve our ability to further advance the Compendium of Physical Activities for Youth. A secondary analysis of oxygen uptake (VO2) data obtained from five sites was completed, that included 947 children ages 5 to 18 years, who engaged in 14 different activities. Resting metabolic rate (RMR) was computed based on Schofield Equations [Hum Nutr Clin Nut. 39(Suppl 1), 1985]. Absolute oxygen uptake (ml.min-1), oxygen uptake per kilogram body mass (VO2 in ml.kg-1.min-1), net oxygen uptake (VO2 – resting metabolic rate), allometric scaled oxygen uptake (VO2 in ml.kg-0.75.min-1) and YOUTH-MET (VO2.[resting VO2] -1) were calculated. These metrics were regressed with age, sex, height, and body mass. Net and allometric-scaled VO2, and YOUTH-MET were least associated with age, sex and physical characteristics. For moderate-to-vigorous intensity activities, allometric scaling was least related to age and sex. For sedentary and low-intensity activities, YOUTH-MET was least related to age and sex. No energy expenditure metric completely eliminated the influence of age, physical characteristics, and sex. The Adult MET consistently overestimated EE. YOUTH-MET was better for expressing energy expenditure for sedentary and light activities, whereas allometric scaling was better for moderate and vigorous intensity activities. From a practical perspective, The YOUTH-MET may be the more feasible metric for improving of the Compendium of Physical Activities for Youth.
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发表时间：
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影响因子：
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