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Muscle strength and hypertrophy occur independently of protein supplementation during short-term resistance training in untrained men.
Appl Physiol Nutr Metab. 2015 Aug; 40(8):797-802.AP

Abstract

Short-term resistance training has consistently demonstrated gains in muscular strength, but not hypertrophy. Post-resistance training protein ingestion is posited to augment the acute anabolic stimulus, thus potentially accelerating changes in muscle size and strength. The purpose of this investigation was to examine the effects of 4 weeks of resistance training with protein supplementation on strength and muscle morphology changes in untrained men. Participants (mean ± SD; N = 18; age, 22.0 ± 2.5 years; body mass index, 25.1 ± 5.4 kg · m(-2)) were randomly assigned to a resistance training + protein group (n = 9; whey (17 g) + colostrum (3 g) + leucine (2 g)) or a resistance training + placebo group (n = 9). One-repetition maximum (1RM) strength in the leg press (LP) and leg extension (LE) exercises, maximal isometric knee extensor strength (MVIC), and muscle morphology (thickness (MT), cross-sectional area (CSA), pennation angle) of the dominant rectus femoris (RF) and vastus lateralis (VL) was assessed before and after training. Participants performed LP and LE exercises (3 × 8-10; at 80% 1RM) 3 days/week for 4 weeks. Data were analyzed using 2-way ANOVA with repeated measures. Four weeks of resistance training resulted in significant increases in LP (p < 0.001), LE (p < 0.001), MVIC (p < 0.001), RF MT (p < 0.001), RF CSA (p < 0.001), VL MT (p < 0.001), and VL CSA (p < 0.001). No between-group differences were observed. Although nutrition can significantly affect training adaptations, these results suggest that short-term resistance training augments muscle strength and size in previously untrained men with no additive benefit from postexercise protein supplementation.

Authors+Show Affiliations

Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA. Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA.Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA. Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA.Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA. Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA.Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA. Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA.Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA. Institute of Exercise Physiology and Wellness, Sport and Exercise Science, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA.

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

26154345

Citation

Boone, Carleigh H., et al. "Muscle Strength and Hypertrophy Occur Independently of Protein Supplementation During Short-term Resistance Training in Untrained Men." Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme, vol. 40, no. 8, 2015, pp. 797-802.
Boone CH, Stout JR, Beyer KS, et al. Muscle strength and hypertrophy occur independently of protein supplementation during short-term resistance training in untrained men. Appl Physiol Nutr Metab. 2015;40(8):797-802.
Boone, C. H., Stout, J. R., Beyer, K. S., Fukuda, D. H., & Hoffman, J. R. (2015). Muscle strength and hypertrophy occur independently of protein supplementation during short-term resistance training in untrained men. Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme, 40(8), 797-802. https://doi.org/10.1139/apnm-2015-0027
Boone CH, et al. Muscle Strength and Hypertrophy Occur Independently of Protein Supplementation During Short-term Resistance Training in Untrained Men. Appl Physiol Nutr Metab. 2015;40(8):797-802. PubMed PMID: 26154345.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Muscle strength and hypertrophy occur independently of protein supplementation during short-term resistance training in untrained men. AU - Boone,Carleigh H, AU - Stout,Jeffrey R, AU - Beyer,Kyle S, AU - Fukuda,David H, AU - Hoffman,Jay R, Y1 - 2015/03/23/ PY - 2015/7/9/entrez PY - 2015/7/15/pubmed PY - 2016/7/7/medline KW - force musculaire KW - hypertrophie KW - hypertrophy KW - morphologie musculaire KW - muscle morphology KW - muscle strength KW - protein KW - protéines KW - supplementation KW - supplémentation SP - 797 EP - 802 JF - Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme JO - Appl Physiol Nutr Metab VL - 40 IS - 8 N2 - Short-term resistance training has consistently demonstrated gains in muscular strength, but not hypertrophy. Post-resistance training protein ingestion is posited to augment the acute anabolic stimulus, thus potentially accelerating changes in muscle size and strength. The purpose of this investigation was to examine the effects of 4 weeks of resistance training with protein supplementation on strength and muscle morphology changes in untrained men. Participants (mean ± SD; N = 18; age, 22.0 ± 2.5 years; body mass index, 25.1 ± 5.4 kg · m(-2)) were randomly assigned to a resistance training + protein group (n = 9; whey (17 g) + colostrum (3 g) + leucine (2 g)) or a resistance training + placebo group (n = 9). One-repetition maximum (1RM) strength in the leg press (LP) and leg extension (LE) exercises, maximal isometric knee extensor strength (MVIC), and muscle morphology (thickness (MT), cross-sectional area (CSA), pennation angle) of the dominant rectus femoris (RF) and vastus lateralis (VL) was assessed before and after training. Participants performed LP and LE exercises (3 × 8-10; at 80% 1RM) 3 days/week for 4 weeks. Data were analyzed using 2-way ANOVA with repeated measures. Four weeks of resistance training resulted in significant increases in LP (p < 0.001), LE (p < 0.001), MVIC (p < 0.001), RF MT (p < 0.001), RF CSA (p < 0.001), VL MT (p < 0.001), and VL CSA (p < 0.001). No between-group differences were observed. Although nutrition can significantly affect training adaptations, these results suggest that short-term resistance training augments muscle strength and size in previously untrained men with no additive benefit from postexercise protein supplementation. SN - 1715-5320 UR - https://www.unboundmedicine.com/medline/citation/26154345/Muscle_strength_and_hypertrophy_occur_independently_of_protein_supplementation_during_short_term_resistance_training_in_untrained_men_ L2 - http://www.nrcresearchpress.com/doi/full/10.1139/apnm-2015-0027?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -