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Physical Activity Measurement in Older Adults

老年人体力活动测量

基本信息

批准号：
7286852
负责人：
LISA H COLBERT
金额：
$ 11.31万
依托单位：
UNIVERSITY OF WISCONSIN-MADISON
依托单位国家：
美国
项目类别：
财政年份：
2006
资助国家：
美国
起止时间：
2006-09-15 至 2010-08-31
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): While the valid measurement of physical activity is generally difficult, measurement in older adults is particularly challenging given the relatively low levels of both total activity and intensity of the activities in which they participate. Self-report has shown limited validity when compared to direct measures of energy expenditure such as doubly labeled water, and there may be particular issues of concern with this methodology in older populations (e.g. impaired cognition). For the assessment of current physical activity levels in older adults, objective monitoring may be particularly advantageous, and if proven valid, will aid in future studies attempting to delineate the associations between physical activity and health. The primary hypothesis of the proposed study is that multiple sensor physical activity monitors will have greater precision than self-report when compared to direct measures of physical activity energy expenditure (doubly labeled water and indirect calorimetry). Additionally, single sensor monitors, either alone or in combination with selected self-report items, will have greater precision than self-report alone. Men and women (n=60), aged 65 or older, will be enrolled in this study. During ten days of energy expenditure measurement via doubly labeled water, subjects will wear a pedometer, a uniaxial accelerometer, and a multiple sensor monitor (accelerometer, galvanic skin response, temperature), and complete three self-report questionnaires for the assessment of physical activity. Single and multiple sensor monitors will also be worn in conjunction with a 24-hour stay in a whole room calorimeter in a smaller sample (n=20) to more precisely evaluate their measurement properties. Correlation, limits of agreement, and regression analyses will be used to determine the validity of the measures either independently, or in combinations, compared to the physical activity energy expenditure measurements. The proposed study will give insight into the most precise and accurate method of measuring current energy expenditure due to physical activity among older adults. This methodology can then be incorporated into future studies examining the associations between doses of physical activity and various health outcomes.

描述（由申请人提供）：虽然身体活动的有效测量通常很困难，但考虑到老年人参与的活动的总活动量和强度相对较低，测量老年人尤其具有挑战性。与直接测量能量消耗（如双标记水）相比，自我报告的有效性有限，并且在老年人群中可能存在与此方法相关的特殊问题（例如认知受损）。对于评估老年人目前的身体活动水平，客观监测可能是特别有利的，如果被证明是有效的，将有助于未来的研究试图描绘身体活动和健康之间的关联。这项研究的主要假设是，与直接测量身体活动能量消耗（双标记水和间接热量测定法）相比，多传感器身体活动监测器将具有比自我报告更高的精度。此外，单传感器监测器，无论是单独使用还是与选定的自我报告项目结合使用，都将比单独使用自我报告具有更高的精度。本研究将入组年龄≥ 65岁的男性和女性（n=60）。在通过双标记水进行的十天能量消耗测量期间，受试者将佩戴计步器、单轴加速计和多传感器监测器（加速计、皮肤电反应、温度），并完成三份自我报告问卷以评估身体活动。单个和多个传感器监测器也将与在较小样本（n=20）中的整个房间热量计中停留24小时结合佩戴，以更精确地评估其测量特性。将使用相关性、一致性限度和回归分析来确定与体力活动能量消耗测量值相比，单独或组合测量值的有效性。这项拟议的研究将深入了解测量老年人体力活动导致的当前能量消耗的最精确和准确的方法。然后，这种方法可以被纳入未来的研究中，研究体力活动剂量与各种健康结果之间的关系。