Kirk, Ben and Mooney, Kate and Cousins, Rosanna and Angell, Peter J. and Jackson, Matthew and Pugh, Jamie and Coyles, Ginny and Amirabdollahian, Farzad and Khaiyat, Omid (2020) Effects of exercise and whey protein on muscle mass, fat mass, myoelectrical muscle fatigue and health-related quality of life in older adults: a secondary analysis of the Liverpool Hope University-Sarcopenia Ageting Trial (LHU-SAT). European Journal of Applied Physiology. pp. 1-11. ISSN 1439-6319
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Abstract
Purpose To investigate the efects of exercise in combination with, or without, a leucine-enriched whey protein supplement on muscle mass, fat mass, myoelectrical muscle fatigue and health-related quality of life (HR-QOL) in older adults.
Methods 100 community-dwelling older adults [52% women, age: 69±6years (mean±SD)] were randomised to four [Control (C); Exercise (E); Exercise + Protein (EP); Protein (P)] independent groups. E and EP groups completed 16 weeks of exercise [resistance (2 times/week) and functional (1 time/week]. EP and P groups were also administered a leucine-enriched whey protein supplement (3 times/day) based on body weight (1.5 g/kg/day). Muscle and fat mass (bioelectrical impedance analysis), myoelectrical muscle fatigue (surface electromyography) and HR-QOL (WHOQOL-BREF) were measured pre- and post-intervention.
Results At post-intervention, the rectus femoris (E:−4.8%/min, p=0.007, ES=0.86; EP:−3.3%/min, p=0.045,ES=0.58) and bicep femoris (E: − 3.9%/min, p < 0.001, ES = 1.46; EP: − 4.3%/min, p < 0.001, ES = 1.58) muscles became more resistant to fatigue in the E and EP groups, respectively (p < 0.05 versus C). HR-QOL improved in the E group only. Muscle and fat mass did not change (p > 0.05).
Conclusion Physical exercise is a potent method to improve myoelectrical muscle fatigue and HR-QOL in older adults. However, leucine-enriched whey protein did not augment this response in those already consuming suicient quantities of protein at trial enrolment.
| Item Type: | Article |
|---|---|
| Additional Information and Comments: | The final publication is available at https://link.springer.com/article/10.1007/s00421-019-04293-5 |
| Keywords: | Exercise, Whey protein, Myoelectrical muscle fatigue, Quality of life |
| Faculty / Department: | Faculty of Human and Digital Sciences > School of Health and Sport Sciences |
| Depositing User: | Rosanna Cousins |
| Date Deposited: | 07 Jan 2020 09:15 |
| Last Modified: | 02 Jan 2021 01:15 |
| URI: | https://hira.hope.ac.uk/id/eprint/2988 |
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