Intensity of Physical Activity in the Energy Expenditure of Older Adults.
Higher physical activity energy expenditure (PAEE) is related to reduced mobility limitations and mortality rates in older adults. Current recommendations for adults focus primarily on activities of moderate or greater intensity. To better understand the potential for common daily activities that contribute to health, this study hypothesized that light intensity activity (such as light house-keeping, light gardening, stretching, and walking) would be as important as moderate or greater intensity activity for the PAEE of older adults.
The authors observed that older adults (mean age: 75 yrs) spent ~9h/day sedentary, ~3h/day in light intensity activity, and ~1h/day in moderate activity. Only a few persons participated in vigorous activity. Furthermore, light intensity activity was as important for PAEE as was activity of moderate or greater intensity.
The authors suggest that it may be easier for older adults to shift some of their sedentary time to light rather than higher intensity activities. This will have an important impact on overall PAEE, in addition to the positive effect of activities of moderate or greater intensity on PAEE. > From: Colbert et al., J Aging Phys Act (2013) (Epub ahead of print). All rights reserved to Human Kinetics, Inc.
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