作者
Jennifer A Schrack, Pei-Lun Kuo, Amal A Wanigatunga, Junrui Di, Eleanor M Simonsick, Adam P Spira, Luigi Ferrucci, Vadim Zipunnikov
发表日期
2019/3/14
期刊
The Journals of Gerontology: Series A
卷号
74
期号
4
页码范围
560-567
出版商
Oxford University Press
简介
Background
With aging, daily physical activity (PA) becomes less frequent and more fragmented. Accumulation patterns of daily PA—including transitions from active-to-sedentary behaviors—may provide important insights into functional status in older, less active populations.
Methods
Participants of the Baltimore Longitudinal Study of Aging (n = 680, 50% male, aged 27–94 years) completed a clinical assessment and wore an Actiheart accelerometer. Transitions between active and sedentary states were modeled as a probability (Active-to-Sedentary Transition Probability [ASTP]) defined as the reciprocal of the average PA bout duration. Cross-sectional associations between ASTP and gait speed (m/s), fatigability (rating-of-perceived-exertion [RPE]), 400 m time (seconds), and expanded short physical performance battery score were modeled using linear and logistic …
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JA Schrack, PL Kuo, AA Wanigatunga, J Di… - The Journals of Gerontology: Series A, 2019