Association between changes in lean mass, muscle strength, endurance, and power following resistance or concurrent training with differing high protein diets in resistance-trained young males.

Autor:	Bagheri R; Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan, Iran., Karimi Z; Department of Physical Education and Sport Sciences, Islamic Azad University of Central Tehran Branch, Tehran, Iran., Camera DM; Department of Health and Biostatistics, Swinburne University, Melbourne, VIC, Australia., Scott D; Institute for Physical Activity and Nutrition (IPAN), Deakin University, Geelong, VIC, Australia.; School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia., Bashirzad MZ; Department of Sport Science, Islamic Azad University, Bojnurd Branch, Bojnurd, Iran., Sadeghi R; Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran., Kargarfard M; Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan, Iran., Dutheil F; Université Clermont Auvergne, CNRS, LaPSCo, Physiological and Psychosocial Stress, CHU Clermont-Ferrand, University Hospital of Clermont-Ferrand, Preventive and Occupational Medicine, Witty Fit, Clermont-Ferrand, France.
Jazyk:	angličtina
Zdroj:	Frontiers in nutrition [Front Nutr] 2024 Aug 14; Vol. 11, pp. 1439037. Date of Electronic Publication: 2024 Aug 14 (Print Publication: 2024).
DOI:	10.3389/fnut.2024.1439037
Abstrakt:	Background: We assessed the relationship of changes in upper and lower body lean mass with muscle strength, endurance and power responses following two high protein diets (1.6 or 3.2 g . kg -1. d -1 ) during 16 weeks of either concurrent training (CT) or resistance training (RT) in resistance-trained young males. Methods: Forty-eight resistance-trained young males (age: 26 ± 6 yr., body mass index: 25.6 ± 2.9 kg.m -2 ) performed 16 weeks (four sessions·wk. -1 ) of CT or RT with either 1.6 g . kg -1. d -1 protein (CT + 1.6; n  = 12; RT + 1.6; n  = 12) or 3.2 g . kg -1. d -1 protein (CT + 3.2; n  = 12; RT + 3.2; n  = 12). Relationships between upper (left arm + right arm + trunk lean mass) and lower body (left leg + right leg lean mass) lean mass changes with changes in muscle performance were assessed using Pearson's correlation coefficients. Results: For upper body, non-significant weak positive relationships were observed between change in upper body lean mass and change in pull-up ( r  = 0.183, p  = 0.234), absolute chest press strength ( r  = 0.159, p  = 0.302), chest press endurance ( r  = 0.041, p  = 0.792), and relative chest press strength ( r  = 0.097, p  = 0.529) while non-significant weak negative relationships were observed for changes in absolute upper body power ( r  = -0.236, p  = 0.123) and relative upper body power ( r  = -0.203, p  = 0.185). For lower body, non-significant weak positive relationships were observed between the change in lower body lean mass with change in vertical jump ( r  = 0.145, p  = 0.346), absolute lower body power ( r  = 0.109, p  = 0.480), absolute leg press strength ( r  = 0.073, p  = 0.638), leg press endurance ( r < 0.001, p  = 0.998), relative leg press strength ( r  = 0.089, p  = 0.564), and relative lower body power ( r = 0.150, p  = 0.332). Conclusion: Changes in muscle strength, endurance and power adaptation responses following 16 weeks of either CT or RT with different high protein intakes were not associated with changes in lean mass in resistance-trained young males. These findings indicate that muscle hypertrophy has a small, or negligible, contributory role in promoting functional adaptations with RT or CT, at least over a 16-week period. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2024 Bagheri, Karimi, Camera, Scott, Bashirzad, Sadeghi, Kargarfard and Dutheil.)
Databáze:	MEDLINE
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