Progressive resistance strength training for improving physical function in older adults.

Area of Science:

• Gerontology
• Exercise Physiology
• Rehabilitation Science

Background:

• Aging is associated with muscle weakness and decline in physical function.
• Progressive resistance strength training (PRT) is a key intervention to counteract age-related muscle loss and functional decline.

Purpose of the Study:

• To evaluate the efficacy of PRT in enhancing physical function among older adults.
• To identify and assess adverse events associated with PRT in this demographic.

Main Methods:

• Systematic review and meta-analysis of randomized controlled trials (RCTs).
• Comprehensive literature search across multiple databases (e.g., Cochrane, MEDLINE, EMBASE) up to 2008.
• Independent data extraction and quality assessment by two reviewers; data pooling where appropriate.

Main Results:

• 121 RCTs involving 6700 participants were included, with PRT typically performed 2-3 times weekly at high intensity.
• Significant improvements observed in physical ability (SMD 0.14), gait speed (MD 0.08 m/s), and chair-rise performance (SMD -0.94).
• PRT demonstrated a large positive effect on muscle strength (SMD 0.84) and reduced pain in participants with osteoarthritis (SMD -0.30).

Conclusions:

• PRT is an effective intervention for improving physical functioning, including strength and activity performance, in older adults.
• Adverse events, primarily musculoskeletal complaints, were reported but serious events were rare.
• Caution is advised when applying PRT to clinical populations due to inadequate reporting of adverse events.