Physical Activity Measurement in Older Adults

老年人体力活动测量

• 批准号: 7045920
• 负责人: LISA H COLBERT
• 金额: $ 11.9万
• 依托单位: UNIVERSITY OF WISCONSIN-MADISON
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7045920
• 关键词: actigraphy; basal metabolism; bioenergetics; body movement; body physical activity; body temperature; calorimetry; clinical research; data collection methodology /evaluation; data quality /integrity; exercise; galvanic skin response; human old age (65+); human subject; monitoring device; questionnaires

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)：虽然体力活动的有效测量通常很困难，但考虑到老年人的总活动量和活动强度都相对较低，测量老年人的体力活动尤其具有挑战性。与直接测量能量消耗的方法(如双标签水)相比，自我报告显示的有效性有限，而且这种方法在老年人群中可能存在特别令人担忧的问题(例如，认知受损)。对于评估老年人目前的体力活动水平，客观监测可能特别有利，如果被证明有效，将有助于未来试图描绘体力活动与健康之间的联系的研究。拟议研究的基本假设是，与直接测量体力活动能量消耗(双标记水和间接量热法)相比，多传感器体力活动监测器将比自我报告具有更高的精确度。此外，单传感器监视器，无论是单独还是与选定的自我报告项目结合使用，都将比单独的自我报告具有更高的精度。年龄在65岁或以上的男性和女性(n=60)将参加这项研究。在为期十天的双标记水能量消耗测量中，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、皮肤电流反应、温度)，并完成三份自我报告问卷，用于评估体力活动。单传感器和多传感器监测器也将在较小样本(n=20)中与24小时呆在整个房间的热量计一起佩戴，以更准确地评估其测量性能。将使用相关性、一致性限度和回归分析来确定这些措施相对于体力活动能量消耗衡量标准的有效性，这些措施可以是独立的，也可以是组合的。这项拟议的研究将使人们深入了解最精确和最准确的方法来测量老年人由于体育活动而产生的当前能量消耗。然后，这种方法可以被纳入未来的研究中，研究身体活动剂量和各种健康结果之间的关系。