Abstract
The purpose of this trial was to examine the effects of self-selected exercise intensities plus either whey protein or placebo supplementation on vital signs, body composition, bone mineral density, muscle strength, and mobility in older adults. A total of 101 participants aged 55 years and older (males [n = 34] and females [n = 67]) were evaluated before and after 12 weeks of self-selected, free-weight resistance exercise plus 30 min of self-paced walking three times per week. The participants were randomized into two groups: whey protein (n = 46) or placebo (n = 55). Three-way mixed factorial analyses of variance were used to test for mean differences for each variable. The 12 weeks of self-selected, self-paced exercise intensities improved resting heart rate, fat-free mass, percent body fat, handgrip strength, bench press strength, leg press strength, and all mobility measurements (p < .05) in males and females despite supplementation status. This suggests that additional protein in well-fed healthy older adults does not enhance the benefit of exercise.
Original language | English (US) |
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Pages (from-to) | 17-26 |
Number of pages | 10 |
Journal | Journal of Aging and Physical Activity |
Volume | 29 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2021 |
Keywords
- Fitness
- Geriactrics
- Protein supplementation
- Resistance training
- Sarcopenia
ASJC Scopus subject areas
- Physical Therapy, Sports Therapy and Rehabilitation
- Rehabilitation
- Gerontology
- Geriatrics and Gerontology