Machine-Based Resistance Training Improves Functional Capacity in Older Adults: A Systematic Review and Meta-Analysis

Area of Science:

• Gerontology
• Exercise Physiology
• Rehabilitation Science

Background:

• Resistance training (RT) is crucial for maintaining functional performance, independence, and quality of life in older adults.
• While functional exercises are recommended, they pose challenges for seniors, making resistance machines a potential alternative.
• Machine-based RT offers a structured approach to strength enhancement for the aging population.

Purpose of the Study:

• To systematically review and meta-analyze the impact of machine-based resistance training on strength and functional capacity in older adults.
• To evaluate the efficacy of resistance machines as a primary tool for RT interventions in this demographic.

Main Methods:

• Systematic review and meta-analysis of studies involving healthy older adults (>60 years).
• Inclusion criteria: minimum 6-week interventions using only resistance machines.
• Outcome measures: pre- and post-intervention assessments of functional capacity (Timed Up-and-Go, Sit-to-Stand) and strength.

Main Results:

• 17 articles were included in the review; 15 contributed to the functional outcomes meta-analysis (n=614) and 11 to strength outcomes (n=511).
• Significant improvements were observed in functional capacity (SMD=0.72) and strength (SMD=0.71) with machine-based RT compared to controls.
• High heterogeneity was noted across studies regarding RT variable manipulation and effect sizes.

Conclusions:

• Machine-based resistance training is an effective method for improving strength and functional performance in older adults.
• This approach provides significant benefits for enhancing physical capabilities and supporting independence in seniors.
• Uncomplicated, machine-based RT programs can yield substantial improvements in health-related outcomes for the elderly.