Physical Activity Intervention Effects on Physical Function Among Community-Dwelling Older Adults: A Systematic...

Area of Science:

• Gerontology
• Exercise Physiology
• Rehabilitation Science

Background:

• Community-dwelling older adults often experience declines in physical functioning.
• Maintaining physical function is crucial for independence and quality of life in aging populations.
• Evidence-based physical activity interventions are needed to mitigate functional decline.

Purpose of the Study:

• To systematically review and meta-analyze the effects of supervised exercise on physical functioning in older adults.
• To identify factors influencing the effectiveness of these physical activity interventions.
• To provide evidence for optimizing exercise programs for older adults.

Main Methods:

• Systematic literature search across diverse databases.
• Meta-analysis of standardized mean difference effect sizes (d, ES) using a random effects model.
• Moderator analyses (subgroup analyses, meta-regression) to explore influencing factors.

Main Results:

• Overall mean effect size (ES) of 0.45, indicating a clinically meaningful improvement in physical functioning.
• Significant reduction in Timed Up and Go test time (0.92 s).
• Greater intervention duration (minutes/week, session length) and targeting frail participants (ES = 1.09) were associated with larger effects.

Conclusions:

• Supervised resistance and/or aerobic training are effective for improving physical functioning in community-dwelling older adults.
• Intervention characteristics like duration, frequency, and participant frailty significantly impact outcomes.
• Future research should detail sample/intervention characteristics and include frail populations.