Physical activity and motor decline in older persons

Area of Science:

• Gerontology
• Neuroscience
• Kinesiology

Background:

• Age-related motor decline is a significant concern for older adults, impacting independence and quality of life.
• Physical activity is widely recognized for its health benefits, but its specific impact on motor decline requires further investigation.

Purpose of the Study:

• To investigate the hypothesis that physical activity modifies the progression of age-related motor decline.
• To quantify the association between baseline physical activity levels and the rate of motor function decline in older adults.

Main Methods:

• Longitudinal study of over 850 older participants from the Rush Memory and Aging Project.
• Baseline assessment of physical activity and annual motor testing (strength and performance) over 8 years.
• Generalized estimating equation models used to analyze changes in global motor function.

Main Results:

• Global motor function showed a significant decline over the follow-up period.
• Each additional hour of physical activity at baseline was associated with a 5% decrease in the rate of global motor function decline (P = 0.007).
• The protective effect of physical activity on motor decline was primarily observed in motor performance.

Conclusions:

• Higher levels of physical activity are associated with a slower rate of motor decline in older individuals.
• Physical activity may play a crucial role in mitigating age-related loss of motor function.
• Findings support the promotion of physical activity for maintaining motor health in aging populations.