Effects of Leucine-Enriched Whey Protein Supplementation on Physical Function in Post-Hospitalized Older Adults Participating in 12-Weeks of Resistance Training Program: A Randomized Controlled Trial

Nutrients

Ariadna Besga¹  Mikel Aldamiz¹  Pilar Anaut¹  Maria Amasene²  Iñaki Echeverria³  Ana Rodriguez-Larrad³  Jon Irazusta³  Miriam Urquiza³  Idoia Labayen⁴  JonatanR. Ruiz⁵ 

[1] Department of Medicine, Araba University Hospital, Bioaraba Research Institute, OSI Araba. CIBERSAM, University of the Basque Country (UPV/EHU), 01004 Vitoria-Gasteiz, Spain;Department of Pharmacy and Food Science, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain;Department of Physiology, University of the Basque Country, UPV/EHU, 48940 Leioa, Spain;ELIKOS group, Institute for Innovation and Sustainable Development in Food Chain (IS-FOOD), Public University of Navarra, 31006 Pamplona, Spain;PROFITH “PROmoting FITness and Health through physical activity” Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain;

关键词: elderly;    aging;    muscle mass;    strength;    resistance training;    leucine;    whey protein;    protein supplementation;   

DOI  :  10.3390/nu11102337

来源: DOAJ

【 摘 要 】

Age-related strength and muscle mass loss is further increased after acute periods of inactivity. To avoid this, resistance training has been proposed as an effective countermeasure, but the additional effect of a protein supplement is not so clear. The aim of this study was to examine the effect of a whey protein supplement enriched with leucine after resistance training on muscle mass and strength gains in a post-hospitalized elderly population. A total of 28 participants were included and allocated to either protein supplementation or placebo supplementation following resistance training for 12 weeks (2 days/week). Physical function (lower and upper body strength, aerobic capacity and the Short Physical Performance Battery (SPPB) test), mini nutritional assessment (MNA) and body composition (Dual X-ray Absorptiometry) were assessed at baseline and after 12 weeks of resistance training. Both groups showed improvements in physical function after the intervention (p < 0.01), but there were no further effects for the protein group (p > 0.05). Muscle mass did not improve after resistance training in either group (p > 0.05). In conclusion, 12 weeks of resistance training are enough to improve physical function in a post-hospitalized elderly population with no further benefits for the protein-supplemented group.

【 授权许可】

Unknown