VALIDATION OF AN INTEGRATED HEART RATE/ACTIVITY MONITOR

这个子项目是许多利用 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 身体活动评估工具在研究中变得越来越重要。 目前，评估身体活动的最常见方法，特别是在大规模人群中，是通过问卷调查。 虽然相当好地验证，这种方法是不太理想的，因为它依赖于受试者回忆，也不能提供准确的信息，关于体力活动的强度。 通过问卷评估的身体活动回忆的替代方案是使用步计数器和加速度计（即，运动传感器），尽管当前可用的产品具有严重的缺点。 例如，步计数器在步行或跑步期间计数步数，但它们对于估计其他类型的活动、提供关于活动模式的时间信息或估计活动能量消耗是没有用的。 大多数当前可用的加速度计也具有一个或多个限制。 因此，需要进一步的研究和开发，以提供一种准确、不显眼和不显眼的活动监测器，可用于量化儿童和成人的身体活动。 巴伦联合公司，位于弗吉尼亚州夏洛茨维尔市的一家公司已经开发出这样一种身体活动监测器（PAM）。 本研究的目的是比较能量消耗估计从这个PAM与实际的能量消耗和心率测量通过氧气消耗与轻便，便携式代谢测量系统。 这项研究工作是响应NIH计划公告（PAR-03-009;改善饮食和身体活动评估），旨在“支持研究，以改善身体活动测量通过改进仪器，技术，或统计/分析技术”，用于“一般和不同的人群。"

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Physical activity assessment tools have become increasingly more important in research. Currently, the most common method for assessing physical activity, especially in large populations, is via questionnaire. Although reasonably well validated, this method is less than ideal as it relies on subject recall and also cannot provide accurate information with regard to the intensity of physical activity. An alternative to physical activity recall as assessed via questionnaire is the use of step counters and accelerometers (i.e., motion sensors) although currently available products have serious shortcomings. For example, step counters count steps during walking or running, but they are not useful for estimating other kinds of activities, for providing temporal information about activity patterns, or for estimating activity energy expenditure. Most of the currently available accelerometers also have one or more limitations. Therefore further research and development is needed to make available an accurate, unobtrusive, and inconspicuous activity monitor that can be used for quantifying physical activity in children and adults. Barron Associates, Inc., in Charlottesville, VA, has developed such a physical activity monitor (PAM). The purpose of the present study is to compare energy expenditure estimates from this PAM with actual energy expenditure and heart rate measured via oxygen consumption with a lightweight, portable metabolic measurement system. This research effort is responsive to an NIH program announcement (PAR-03-009; Improving Diet and Physical Activity Assessment) designed to "support research to improve physical activity measurement through improved instruments, technologies, or statistical/analytic techniques," for use in "general and diverse populations."