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The SIMAC study: A randomized controlled trial to compare the effects of resistance training and aerobic training on the fitness and body composition of Colombian adolescents.

Cohen, Daniel Dylan and Sandercock, Gavin R and Camacho, Paul Anthony and Otero-Wandurraga, Johanna and Romero, Sandra Milena Pinzon and Marín, Rocío Del Pilar Martínez and Sierra, Camilo Andrés Villamizar and Carreño, Javier and Moran, Jason and Lopez-Jaramillo, Patricio (2021) 'The SIMAC study: A randomized controlled trial to compare the effects of resistance training and aerobic training on the fitness and body composition of Colombian adolescents.' PLoS One, 16 (4). e0248110-e0248110. ISSN 1932-6203

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The aim of this study was to evaluate the impact on muscle strength, aerobic fitness and body composition, of replacing the physical education (PE) class of Colombian adolescents with resistance or aerobic training. 120 tanner stage 3 adolescents attending a state school were randomized to resistance training, aerobic training, or a control group who continued to attend a weekly 2- hour PE class for 16 weeks. The resistance training and aerobic training groups participated in twice weekly supervised after-school exercise sessions of < 1 hour instead of their PE class. Sum of skinfolds, lean body mass (bioelectrical impedance analysis), muscular strength (6 repetition maximum (RM)) bench press, lateral pulldown and leg press) and estimated cardiorespiratory fitness (multistage 20 meter shuttle run) were assessed at pre and post intervention. Complete data were available for n = 40 of the resistance training group, n = 40 of the aerobic training group and n = 30 PE (controls). Resistance training attenuated increases in sum of skinfolds compared with controls (d = 0.27, [0.09-0.36]). We found no significant effect on lean body mass. Resistance training produced a positive effect on muscle strength compared with both controls (d = 0.66 [.49-.86]) and aerobic training (d = 0.55[0.28-0.67]). There was a positive effect of resistance training on cardiorespiratory fitness compared with controls (d = 0.04 [-0.10-0.12]) but not compared with aerobic training (d = 0.24 [0.10-0.36]). Replacing a 2-hour PE class with two 1 hour resistance training sessions attenuated gains in subcutaneous adiposity, and enhanced muscle strength and aerobic fitness development in Colombian youth, based on a median attendance of approximately 1 session a week. Further research to assess whether adequate stimuli for the development of muscular fitness exists within current physical education provision is warranted.

Item Type: Article
Additional Information: Data Availability: The data underlying this study are publicly available at the Dryad repository:
Uncontrolled Keywords: Muscle, Skeletal; Humans; Obesity; Exercise Test; Exercise; Exercise Therapy; Body Composition; Weight Lifting; Physical Fitness; Adolescent; Colombia; Female; Male; Muscle Strength; Resistance Training; Cardiorespiratory Fitness
Divisions: Faculty of Science and Health
Faculty of Science and Health > Sport, Rehabilitation and Exercise Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 21 May 2021 12:42
Last Modified: 18 Aug 2022 11:41

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