التفاصيل البيبلوغرافية
| العنوان: |
Using Heart Rate and Accelerometry to Define Quantity and Intensity of Physical Activity in Older Adults. |
| المؤلفون: |
Schrack, Jennifer A., Leroux, Andrew, Fleg, Jerome L., Zipunnikov, Vadim, Simonsick, Eleanor M., Studenski, Stephanie A., Crainiceanu, Ciprian, Ferrucci, Luigi |
| المصدر: |
Journals of Gerontology Series A: Biological Sciences & Medical Sciences; May2018, Vol. 73 Issue 5, p668-675, 8p |
| مصطلحات موضوعية: |
PHYSICAL activity, ACCELEROMETRY, HEART beat, HEALTH of older people, WEARABLE technology, LONGITUDINAL method, MOTOR ability, RESEARCH funding, CROSS-sectional method |
| مصطلحات جغرافية: |
MARYLAND |
| مستخلص: |
Background: Physical activity (PA) prevents disease and promotes longevity; yet, few older adults meet the recommended daily guidelines. Wearable PA and heart rate monitors provide the opportunity to define age-related differences in the absolute and relative intensity of daily activities, and provide insight into the underlying factors influencing PA in older adults.Methods: Participants in the Baltimore Longitudinal Study of Aging (n = 440, 52% male, aged 31 to 88 years) completed a clinical assessment and wore an Actiheart monitor in the free-living environment. The association between age and minutes per day in sedentary, light, moderate, and vigorous PA was assessed using relative intensity, as defined by heart rate reserve, and absolute intensity using activity count thresholds.Results: In cross-sectional analyses, time spent in sedentary and light activities as defined by relative intensity did not differ across age (p > 0.05), whereas time spent in moderate and vigorous relative PA was higher for each 1 year increase in age (p < .01). Using absolute intensity PA thresholds, older adults registered fewer activity counts per day with more sedentary time and lesser amounts of light, moderate, and vigorous PA (p < .05). Persons with higher relative and lower absolute PA intensity had poorer functional performance and higher subclinical disease indicators.Conclusions: These findings suggest that time spent in moderate or higher intensity activities may not be lower with age after considering changes in physiology, functional ability, and subclinical disease burden and highlight the need for more age- and ability-specific PA research to inform future interventions and public health guidelines. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journals of Gerontology Series A: Biological Sciences & Medical Sciences is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder