Protein Supplementation for Strength and Functionality in Older Adults: Is There Still Any Doubt? A Brief Update
Júlio Benvenutti Bueno de Camargo1, Alexandre Ferraz de Oliveira1
1Human Performance Research Laboratory, Methodist University of Piracicaba, Piracicaba, SP,Brazil.
Journal of Aging and Physical Activity
|August 8, 2022
Summary
Protein supplementation (PS) does not appear to benefit healthy older adults already consuming adequate protein when combined with resistance training. Further research is needed for specific older adult subgroups.
Area of Science:
- Gerontology and Exercise Science
- Muscle Physiology and Aging
Background:
- Aging leads to muscle impairments (sarcopenia), affecting morphology and function.
- Resistance training and adequate protein intake are key to mitigating age-related muscle loss.
- The efficacy of protein supplementation (PS) alongside resistance training in older adults remains debated.
Purpose of the Study:
- To systematically review recent evidence on protein supplementation (PS) effects on muscle strength and function in older adults.
- To calculate effect sizes for individual studies to enhance clinical relevance.
Main Methods:
- Systematic literature review of studies investigating protein supplementation and resistance training in older adults.
- Calculation of post-intervention minus pre-intervention effect sizes for muscle strength and functional parameters.
Main Results:
- Current evidence does not support the routine use of protein supplementation (PS) for healthy older adults with sufficient dietary protein intake.
- Effect sizes from included studies were analyzed for clinical significance.
Conclusions:
- Protein supplementation (PS) may not be beneficial for healthy, well-nourished older adults undertaking resistance training.
- Further investigation is required for specific populations like the very old, frail, obese, or those with inadequate protein consumption.
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