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Physical activity and parameters of aging: a physiological perspective.
1Department of Human Biology, Maastricht University, The Netherlands. K.Westerterp@HB.Unimaas.NL
Summary
An active lifestyle does not prevent age-related loss of fat-free mass. However, exercise training may delay mobility issues linked to reduced physical activity in older adults.
Area of Science:
- Gerontology
- Human Physiology
- Body Composition Research
Background:
- Aging is linked to decreased fat-free mass.
- The impact of lifestyle on age-related body composition changes is not fully understood.
Purpose of the Study:
- To investigate if an active lifestyle can delay age-related body composition changes.
- To examine the relationship between physical activity, aging, and body composition.
Main Methods:
- Analysis of data from 136 women and 180 men (aged >20 years) tested between 1983-1998.
- Physical activity assessed using doubly labeled water.
- Body composition measured via hydrodensitometry or isotope dilution.
Main Results:
- Increasing age correlated with lower activity levels and reduced fat-free mass.
- After accounting for age, physical activity showed no association with fat-free mass.
- Elderly individuals often compensate for exercise training by reducing spontaneous physical activity.
Conclusions:
- Habitual physical activity levels do not appear to influence age-related body composition changes.
- Exercise training positively impacts muscle function.
- Physical activity may delay age-induced mobility impairments associated with reduced movement.