Ubiquitous computing for the measurement of physical activity

描述(由申请人提供)：该R21探索性/发展研究项目的目标是建立一种创新的多传感器板设备的有效性和可靠性，用于测量体力活动的类型、数量和相关的能量消耗。这些目标将通过在60名成年人中进行的一系列实验室和现场实验来实现。在具体目标1中，我们将扩展我们的前期工作，在实验室建立多传感器水平测量和分级跑步机行走和跑步的准确性，以及在野外实验中建立更常见和自然的人体运动形式，如上下楼梯、乘坐电梯等。将使用记录的活动(标记为“地面真实”)作为标准衡量标准来确定准确性。在具体目标2中，我们将通过“训练”该设备来扩展多传感器板的当前能力，以提供与所测量的活动相关的能量消耗估计。将使用耗氧量作为标准测量来确定准确度。我们假设，多传感器电路板提供了在自由生活条件下成年人体力活动及其相关能量消耗的有效和可靠的测量。这项工作很重要，因为体力活动是肥胖和慢性病研究、预防和治疗的重要组成部分。将体力活动与健康联系起来的能力取决于它的准确和精确的测量，这一点我们将在本研究中建立。然而，由于与成本、便利性和测量误差有关的问题，目前可用的方法中没有一种是完全令人满意的。为了克服这些限制，我们引入了一种新的便携式多传感器电路板，能够从正在进行的活动中捕获不同的线索。小型传感单元(2.53平方英尺)In。)具有八种不同的传感功能，包括加速度计、音频、红外/可见光、高频光、气压、湿度、温度和地球物理位置，用于测量许多不同的人体运动。与其他仪器相比，我们有一个明显的优势，那就是我们采用了“无处不在”的技术，这将使人们能够比目前更自然地四处走动并与环境互动。例如，该单元可以集成到现有的移动平台中，例如移动电话，人们已经拥有并每天使用这些平台。我们的长期目标是在测量自由生活人口的体力活动和能量消耗方面建立新的最先进的水平。这项研究在公共卫生方面有许多应用，包括体重控制、为康复开发个人辅助设备，以及改善国家对体育活动的监测。这项研究的目的是确定一种创新的多传感器电路板用于测量一些常见的人类身体活动的准确性。这项工作对公众健康很重要，因为体力活动是肥胖和与健康相关的研究、预防和治疗工作的重要组成部分。这项研究的长期目标是在测量人类体力活动和能量消耗方面建立新的最先进的水平，这将在公共卫生方面有许多应用，包括控制体重，开发用于康复的个人辅助设备，以及改善对人口体力活动水平的国家监测。

DESCRIPTION (provided by applicant): The goals of this R21 exploratory/developmental research project are to establish the validity and reliability of an innovative multi-sensor board device for measuring physical activity type, amount, and associated energy expenditure. These goals will be addressed through a series of laboratory and field experiments in a group of 60 adults. In Specific Aim 1, we will extend our preliminary work by establishing the accuracy of the multi- sensor board for measuring level and graded treadmill walking and running in the laboratory, as well as more common and natural forms of human movement such as walking up/down stairs, riding up/down an elevator, etc., in a field experiment. Accuracy will be established using the recorded activities (labelled "ground-truth") as the standard measures. In Specific Aim 2, we will expand the current capabilities of the multi-sensor board by "training" the device to provide estimates of energy expenditure associated with the measured activities. Accuracy will be established using oxygen consumption as the standard measure. We hypothesize that the multi-sensor board provides valid and reliable measures of physical activity and its associated energy expenditure in adults under free-living conditions. This work is important because physical activity is a significant component of obesity and chronic disease research, prevention, and treatment. The ability to relate physical activity to health depends on its accurate and precise measurement, which we will establish in this study. None of the currently available methods are fully satisfactory, however, because of problems related to cost, convenience, and measurement error. To overcome these limitations, we introduce a new, portable multi- sensor board capable of capturing diverse cues from ongoing activities. The small sensing unit (2.53 sq. in.) has eight different sensing capabilities, including accelerometry, audio, IR/visible light, high-frequency light, barometric pressure, humidity, temperature, and geophysical location, for measuring a number of different human movements. A distinct advantage over other instruments is that we employ "ubiquitous" technology that will enable people to move around and interact with their environment more naturally than they currently are able to do. For example, the unit can be integrated into existing mobile platforms, such as a cellular telephone, that people already have and use on a daily basis. Our longer-term goal is to establish the new state-of-the-art in measuring physical activity and energy expenditure in free-living populations. This research has numerous applications to public health, including weight control, development of personal assistive devices for rehabilitation, and improving national surveillance of physical activity. The purpose of this research is to determine the accuracy of an innovative multi-sensor board for measuring a number of common human physical activities. This work is important to public health because physical activity is an essential component of obesity and health-related research, prevention, and treatment efforts. The long- term goal of this research is to establish the new state-of-the-art in measuring human physical activity and energy expenditure that will have numerous applications to public health, including weight control, development of personal assistive devices for rehabilitation, and improving national surveillance of physical activity levels in the population.