Toggle Main Menu Toggle Search

Open Access padlockePrints

The effects of a high-protein diet on markers of muscle damage following exercise in active older adults: A randomized, controlled trial

Lookup NU author(s): Tom Clifford, Ellie Hayes, Jadine Scragg, Guy Taylor, Kieran Smith, Dr Kelly Bowden Davies, Professor Emma Stevenson

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

© 2020 Human Kinetics, Inc.Purpose: This study examined whether a higher protein diet following strenuous exercise can alter markers of muscle damage and inflammation in older adults. Methods: Using a double-blind, independent group design, 10 males and eight females (age 57 ± 4 years; mass 72.3 ± 5.6 kg; height 1.7 ± 6.5 m) were supplied with a higher protein (2.50 g·kg−1·day−1) or moderate protein (1.25 g·kg−1·day−1) diet for 48 hr after 140 squats with 25% of their body mass. Maximal isometric voluntary contractions, muscle soreness, creatine kinase, Brief Assessment of Mood Adapted, and inflammatory markers were measured preexercise, and 24 hr and 48 hr postexercise. Results: The maximal isometric voluntary contractions decreased postexercise (p = .001, η2p = .421), but did not differ between groups (p = .822, η2p = .012). Muscle soreness peaked at 24 hr post in moderate protein (44 ± 30 mm) and 48 hr post in higher protein (70 ± 46 mm; p = .005; η2p = .282); however, no group differences were found (p = .585; η2p = .083). Monocytes and lymphocytes significantly decreased postexercise, and eosinophils increased 24 hr postexercise (p < 0.05), but neutrophils, creatine kinase, interleukin-6, C-reactive protein, monocyte chemotactic protein-1, and Brief Assessment of Mood Adapted were unchanged by exercise or the intervention (p > .05). Conclusion: In conclusion, 2.50 g·kg−1·day−1 of protein is not more effective than 1.25 g·kg−1·day−1 for attenuating indirect markers of muscle damage and inflammation following strenuous exercise in older adults.


Publication metadata

Author(s): Clifford T, Hayes EJ, Scragg JH, Taylor G, Smith K, Bowden Davies KA, Stevenson EJ

Publication type: Article

Publication status: Published

Journal: International Journal of Sport Nutrition and Exercise Metabolism

Year: 2020

Volume: 30

Issue: 5

Pages: 323-329

Online publication date: 01/11/2020

Acceptance date: 02/04/2016

ISSN (print): 1526-484X

ISSN (electronic): 1543-2742

Publisher: Human Kinetics Publishers Inc.

URL: https://doi.org/10.1123/ijsnem.2020-0113

DOI: 10.1123/IJSNEM.2020-0113

PubMed id: 32698121


Altmetrics

Altmetrics provided by Altmetric


Share