Salvador Vargas1,2, Jorge L Petro3, Ramón Romance4, Diego A Bonilla3,5, Miguel Ángel Florido6, Richard B Kreider7, Brad J Schoenfeld8, Javier Benítez-Porres9. 1. EADE-University of Wales Trinity Saint David, Málaga, Spain. salvadorvargasmolina@gmail.com. 2. Human Kinetics and Body Composition Laboratory, University of Málaga, Málaga, Spain. salvadorvargasmolina@gmail.com. 3. Research Group in Physical Activity, Sports and Health Sciences, Universidad de Córdoba, Montería, Colombia. 4. Human Kinetics and Body Composition Laboratory, University of Málaga, Málaga, Spain. 5. Research Group in Biochemistry and Molecular Biology, Universidad Distrital Francisco José de Caldas, Bogotá, Colombia. 6. BetterbyScience, Málaga, Spain. 7. Exercise and Sport Nutrition Lab, Human Clinical Research Facility, Texas A&M University, College Station, TX, USA. 8. Department of Health Sciences, CUNY Lehman College, New York, NY, USA. 9. Human Kinetics and Body Composition Laboratory, University of Málaga, Málaga, Spain. benitez@uma.es.
Abstract
PURPOSE: The aim of this study was to compare the effects of resistance training (RT) with an emphasis on either muscular strength-type RT or muscular endurance-type RT on measures of body composition. METHODS:Twenty-five resistance-trained men (age 28.4 ± 6.4 years; body mass 75.9 ± 8.4 kg; height 176.9 ± 7.5 cm) were randomly assigned to either a strength-type RT group that performed three sets of 6-8 repetition maximum (RM) with 3-min rest (n = 10), an endurance-type RT group that performed three sets of 20-25 RM with a 60-s rest interval (n = 10), or a control group (n = 5, CG). All groups completed each set until muscular failure and were supervised to follow a hyperenergetic diet (39 kcal·kg-1·day-1). Body composition changes were measured by dual-energy X-ray absorptiometry. RESULTS: After 8 weeks, we found significant increases in total body mass (0.9 [0.3-1.5] kg; p < 0.05; ES = < 0.2) and lean body mass (LBM) (1.3 [0.5-2.2] kg; p < 0.05; ES = 0.31) only in the strength-type RT group; however, no significant interactions were noted between groups. CONCLUSIONS: Although only strength-type RT showed statistically significant increases in LBM from baseline, no between-group differences were noted for any body composition outcome. These findings suggest that LBM gains in resistance trained are not significantly influenced by the type of training stimulus over an 8-week training period.
RCT Entities:
PURPOSE: The aim of this study was to compare the effects of resistance training (RT) with an emphasis on either muscular strength-type RT or muscular endurance-type RT on measures of body composition. METHODS: Twenty-five resistance-trained men (age 28.4 ± 6.4 years; body mass 75.9 ± 8.4 kg; height 176.9 ± 7.5 cm) were randomly assigned to either a strength-type RT group that performed three sets of 6-8 repetition maximum (RM) with 3-min rest (n = 10), an endurance-type RT group that performed three sets of 20-25 RM with a 60-s rest interval (n = 10), or a control group (n = 5, CG). All groups completed each set until muscular failure and were supervised to follow a hyperenergetic diet (39 kcal·kg-1·day-1). Body composition changes were measured by dual-energy X-ray absorptiometry. RESULTS: After 8 weeks, we found significant increases in total body mass (0.9 [0.3-1.5] kg; p < 0.05; ES = < 0.2) and lean body mass (LBM) (1.3 [0.5-2.2] kg; p < 0.05; ES = 0.31) only in the strength-type RT group; however, no significant interactions were noted between groups. CONCLUSIONS: Although only strength-type RT showed statistically significant increases in LBM from baseline, no between-group differences were noted for any body composition outcome. These findings suggest that LBM gains in resistance trained are not significantly influenced by the type of training stimulus over an 8-week training period.
Entities:
Keywords:
Body composition; Exercise; Fitness; Physiology; Training
Authors: Salvador Vargas-Molina; José L Gómez-Urquiza; Jerónimo García-Romero; Javier Benítez-Porres Journal: Int J Environ Res Public Health Date: 2022-10-03 Impact factor: 4.614
Authors: Tyler G Ketterl; Sheri Ballard; Miranda C Bradford; Eric J Chow; Kari Jenssen; Sam Myers; Abby R Rosenberg; Matt Van Doren; K Scott Baker Journal: Pediatr Blood Cancer Date: 2021-07-14 Impact factor: 3.167