Open AccessEffects of Different Dietary Energy Intake Following Resistance Training on Muscle Mass and Body Fat in Bodybuilders: A Pilot Study
Author(s) -
Alex S. Ribeiro,
João Pedro Nunes,
Brad J. Schöenfeld,
Andreo Fernando Aguiar,
Edílson Serpeloni Cyrino
Publication year - 2019
Publication title -
journal of human kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 37
eISSN - 1899-7562
pISSN - 1640-5544
DOI - 10.2478/hukin-2019-0038
Subject(s) - resistance training , medicine , muscle mass , zoology , fat mass , endocrinology , physical therapy , physiology , body mass index , biology
The purpose of this study was to determine the effects of different amounts of energy intake in combination with progressive resistance training on muscle mass and body fat in bodybuilders. Eleven male bodybuilders (26.8 ± 2.3 years, 90.1 ± 9.7 kg, and 176.9 ± 7.1 cm) were randomly assigned into one of two groups: a group that ingested higher amounts of energy (G1, 67.5 ± 1.7 kcal/kg/d, n = 6), and a group that ingested moderate amounts of energy (G2, 50.1 ± 0.51 kcal/kg/d, n = 5). Both groups performed resistance training 6 days per week over a 4-week study period. Measures of body composition were assessed before and after the intervention period. For body fat, only the G1 presented significant changes from pre- to post-training (G1 = +7.4% vs. G2 = +0.8%). For muscle mass, both groups showed significant increases after the intervention period, with G1 presenting a greater increase compared to G2 (G1 = +2.7% vs. G2 = +1.1%). Results suggest that greater energy intake in combination with resistance training induces greater increases in both muscle mass and body fat in competitive male bodybuilders.