Physical Activity Monitoring In the LIFE Study Using the Actigraph Accelerometer

使用 Actigraph 加速度计进行生命研究中的体力活动监测

• 批准号: 7592099
• 负责人: Jack M Guralnik
• 金额: $ 10.34万
• 依托单位: NATIONAL INSTITUTE ON AGING
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/7592099
• 关键词: Acceleration; Class; Count; Daily; Data; Documentation; Education; Elderly; Evaluation; Exercise; Hip region structure; Home environment; Hour; Intervention; Life; Measurement; Monitor; Movement; Numbers; Paper; Participant; Persons; Physical activity; Pilot Projects; Preparation; Protocols documentation; Questionnaires; Rate; Research Personnel; Right-On; Specific qualifier value; Time; Treatment Protocols; Walking; base; conditioning; day; healthy aging; lifestyle intervention; meter; solid state; time interval; tool

The major intervention in the LIFE pilot study for participants assigned to the exercise group will be walking. According to the treatment protocol, during the first six months as much as half of their increase in walking will be carried out at home or in a non-supervised setting. During the second six months, at least 75% of the assigned walking will be non-supervised for most participants. To know if this intervention was accomplished, LIFE investigators need documentation that a significant increase in walking took place in the exercise participants versus the healthy aging class participants. Currently the protocol includes the use of pedometers, logs and the CHAMPS questionnaire to inform the investigators about the activity profile of each study participant. While all of these measurement tools are likely to provide useful data, none have been proven to provide an accurate and objective assessment of the daily physical activity profile of older, somewhat frail persons. The Actigraph is a small solid-state accelerometer/recorder (6.6 x 4.3 x 2.5 cm., 70 grams) that can store the number of times it moves x the rate of movement change (acceleration) on a continuous basis for up to a month (approximate battery life). It stores these counts for specified times intervals, usually set at one-minute. For LIFE, this monitor will be worn on the right hip of each participant. The trial is now complete and actigraph data are being cleaned and analyzed. A paper on the results is in preparation.

LIFE 试点研究中对分配到运动组的参与者的主要干预措施是步行。 根据治疗方案，在最初的六个月内，他们增加的步行量中有一半将在家里或无人监督的环境中进行。在接下来的六个月中，对于大多数参与者来说，至少 75% 的指定步行将不受监督。 为了了解这种干预措施是否完成，LIFE 调查人员需要记录证明运动参与者与健康老龄化类别参与者相比步行次数显着增加。目前，该协议包括使用计步器、日志和 CHAMPS 问卷来向研究人员通报每个研究参与者的活动概况。虽然所有这些测量工具都可能提供有用的数据，但没有一个被证明可以对老年人、有些虚弱的人的日常身体活动状况提供准确和客观的评估。 Actigraph 是一款小型固态加速度计/记录仪（6.6 x 4.3 x 2.5 厘米，70 克），可以连续存储一个月的移动次数 x 移动变化率（加速度） （大约电池寿命）。它存储指定时间间隔的这些计数，通常设置为一分钟。 对于 LIFE，该监视器将佩戴在每个参与者的右臀部。 试验现已完成，活动记录仪数据正在清理和分析。 关于结果的论文正在准备中。