Light Intensity Physical Activity and Sedentary Behavior in Relation to Body Mass Index and Grip Strength in Older Adults: Cross-Sectional Findings from the Lifestyle Interventions and Independence for Elders (LIFE) Study
Year: 2015
Type: article
Abstract: BACKGROUND: Identifying modifiable determinants of fat mass and muscle strength in older adults is important given their impact on physical functioning and health. Light intensity physical activity and sedentary behavior are potential determinants, but their relations to these outcomes are poorly understood. We evaluated associations of light intensity physical activity and sedentary time-assessed both objectively and by self-report-with body mass index (BMI) and grip strength in a large sample of older adults. METHODS: We used cross-sectional baseline data from 1130 participants of the Lifestyle Interventions and Independence for Elders (LIFE) study, a community-dwelling sample of relatively sedentary older adults (70-89 years) at heightened risk of mobility disability. Time spent sedentary and in light intensity activity were assessed using an accelerometer worn for 3-7 days (Actigraph GT3X) and by self-report. Associations between these exposures and measured BMI and grip strength were evaluated using linear regression. RESULTS: Greater time spent in light intensity activity and lower sedentary times were both associated with lower BMI. This was evident using objective measures of lower-light intensity, and both objective and self-reported measures of higher-light intensity activity. Time spent watching television was positively associated with BMI, while reading and computer use were not. Greater time spent in higher but not lower intensities of light activity (assessed objectively) was associated with greater grip strength in men but not women, while neither objectively assessed nor self-reported sedentary time was associated with grip strength. CONCLUSIONS: In this cross-sectional study, greater time spent in light intensity activity and lower sedentary times were associated with lower BMI. These results are consistent with the hypothesis that replacing sedentary activities with light intensity activities could lead to lower BMI levels and obesity prevalence among the population of older adults. However, longitudinal and experimental studies are needed to strengthen causal inferences.
Source: PLoS ONE
Authors: David Bann, Don Hire, Todd Manini, Rachel Cooper, Anda Botoseneanu, Mary M. McDermott, Marco Pahor, Nancy W. Glynn, Roger Fielding, Abby C. King, Timothy Church, Walter T. Ambrosius, Thomas Gill, for the LIFE Study Group
Institutions: MRC Unit for Lifelong Health and Ageing, University College London, Wake Forest University Health Sciences, Wake Forest University, University of Florida, University of Michigan, University of Michigan–Dearborn, Institute of Gerontology, The University of Tokyo, Northwestern University, University of Pittsburgh, Tufts University, Jean Mayer Human Nutrition Research Center on Aging, Stanford Medicine, Stanford University, Pennington Biomedical Research Center, Yale University
Language: English
Topic: Physical Activity and Health
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $1,198
Funders: U.S. Department of Agriculture, Yale University, Wake Forest University, University of Florida, University of Pittsburgh, Georgia Clinical and Translational Science Alliance, National Institutes of Health, Medical Research Council, Economic and Social Research Council, National Institute on Aging, National Center for Research Resources, National Center for Advancing Translational Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development
Awards: G1029652654, G1032447267, The LIFE Study, G1501842456, G1625562486, Improving Outcome Measurement for Medical Rehabilitaiton Clinical Trials, Centre for Longitudinal Studies, Resource Centre 2015-20, Spectrum Stanford Center for clinical and Translational Research and Education, Stanford Center for Clinical and Translational Education and Research (SCCTER)UL1, G3420384484, G3503574553, G4365909528, ACADEMIC LEADERSHIP AWARD IN DISABILITY AND DISABLING DISORDERS, G5608103526, G5659566681, G644155597, G6514240473, G681674736, G6881567127, G6978208629, Yale University Clinical and Translational Science Award Program, G8009870971, G8107234578, G8366796405, G864677944, G9000208770, Boston OAIC: A Translational Approach to Function Promoting Therapies, Pittsburgh Older Americans Independence Center, University of Florida Older Americans Independence Center (OAIC), Wake Forest Claude D. Pepper OAIC - Renewal, Claude D. Pepper Older Americans Independence Center at Yale
OpenAlex ID: W2142443169