The use of uniaxial accelerometry for the assessment of physical-activity-related energy expenditure: a validation study against whole-body indirect calorimetry
The use of uniaxial accelerometry for the assessment of physical-activity-related energy expenditure: a validation study against whole-body indirect calorimetry
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DOI：
10.1079/bjn20031033
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发表时间：
2004-02-01
影响因子：
3.6
通讯作者：
Tanaka, H
中科院分区：
文献类型：
--
作者：
Kumahara, H;Schutz, Y;Tanaka, H
用非侵入性技术评估自由生活条件下的总能量消耗(TEE)和体力活动水平仍然是一个挑战。本研究的目的是研究一种新的单轴加速度计在呼吸室24小时内评估TEE和体力活动相关能量消耗(PAEE)的准确性，并基于与操作定义的代谢当量(MET)类别相对应的加速范围来确定活动水平。在研究1中，79名日本受试者(40(SD，12岁))在大型呼吸室中进行了24小时能量消耗的测量。在测量过程中，受试者在腰带上佩戴了单轴加速度计(日本名古屋铃木株式会社生命记录仪)。在卧式跑步机上进行两次30min的适度步行训练。在研究2中，10名男性受试者以6种不同的速度行走，并在跑步机上用相同的加速度计以3种不同的速度跑步4分钟。在每个阶段的最后一分钟测量O-2消耗，并以MET表示。TEE为8447(SD1337)kJ/d，加速度计显著低估了TEE和PAEE(分别为91.9(SD5.4)和92.7(SD17.8)%的室内值)，但两者之间存在显著的相关性(r分别为0.928和0.564；P
Assessing the total energy expenditure (TEE) and the levels of physical activity in free-living conditions with non-invasive techniques remains a challenge. The purpose of the present study was to investigate the accuracy of a new uniaxial accelerometer for assessing TEE and physical-activity-related energy expenditure (PAEE) over a 24 h period in a respiratory chamber, and to establish activity levels based on the accelerometry ranges corresponding to the operationally defined metabolic equivalent (MET) categories. In study 1, measurement of the 24 h energy expenditure of seventy-nine Japanese subjects (40 (SD 12) years old) was performed in a large respiratory chamber. During the measurements, the subjects wore a uniaxial accelerometer (Lifecorder; Suzuken Co. Ltd, Nagoya, Japan) on their belt. Two moderate walking exercises of 30 min each were performed on a horizontal treadmill. In study 2, ten male subjects walked at six different speeds and ran at three different speeds on a treadmill for 4 min, with the same accelerometer. O-2 consumption was measured during the last minute of each stage and was expressed in MET. The measured TEE was 8447 (SD 1337) kJ/d. The accelerometer significantly underestimated TEE and PAEE (91.9 (SD 5.4) and 92.7 (SD 17.8) % chamber value respectively); however, there was a significant correlation between the two values (r 0.928 and 0.564 respectively; P