Anne Mette Rustaden1, Lene A H Haakstad2, Gøran Paulsen3, Kari Bø4. 1. Department of Sports Medicine, Norwegian School of Sports Sciences, P.O. Box 4014, Ullevål Stadion, 0806 Oslo, Norway. Electronic address: anne.mette.rustaden@nih.no. 2. Department of Sports Medicine, Norwegian School of Sports Sciences, P.O. Box 4014, Ullevål Stadion, 0806 Oslo, Norway. Electronic address: l.a.h.haakstad@nih.no. 3. The Norwegian Olympic and Paralympic Committe and Confederation of Sport, P.O. Box 4004, Ullevål Stadion, 0806 Oslo, Norway. Electronic address: goran.paulsen@olympiatoppen.no. 4. Department of Sports Medicine, Norwegian School of Sports Sciences, P.O. Box 4014, Ullevål Stadion, 0806 Oslo, Norway. Electronic address: kari.bo@nih.no.
Abstract
OBJECTIVES:Overweight and obese individuals are recommended to perform regular resistance training, and the health- and fitness industry offer several exercise programs with purpose to improve muscle strength and body composition. This randomised controlled trial aimed to compare 12 weeks (45-60min, 3 sessions/weeks) of popular exercise programs, available at health- and fitness centers worldwide. METHODS:Previous untrained women with BMI≥25 were allocated to either BodyPump (a high-repetition group session) (n=25), individual resistance training with a personal trainer (n=25), non-supervised individual resistance training (n=21) and non-exercising control group (n=21). Primary outcome was one repetition maximum (1RM) in squat and bench press, and secondary outcome was body composition (Inbody720). RESULTS: The BodyPump group did not improve muscle strength, compared to any of the other groups. In 1RM squat, the personal trainer group increased 17% (95% CI 5.1-23.0), 20% (95% CI 7.5-24.8) and 30% (95% CI 15.8-33.0kg) more than the non-supervised group, BodyPump and controls, respectively. In bench press the personal trainer group increased 10% (95% CI 1.5-7.2) and 16% (95% CI 3.5-9.3kg) more compared to BodyPump and controls. No difference was found compared to the non-supervised group in bench press. There were no between-group differences in body composition. CONCLUSION: Twelve weeks of BodyPump did not improve muscle strength in overweight women, but a personal trainer amplified the effects of individual resistance training on maximal strength in squat. None of the intervention groups showed effect in body composition.
RCT Entities:
OBJECTIVES: Overweight and obese individuals are recommended to perform regular resistance training, and the health- and fitness industry offer several exercise programs with purpose to improve muscle strength and body composition. This randomised controlled trial aimed to compare 12 weeks (45-60min, 3 sessions/weeks) of popular exercise programs, available at health- and fitness centers worldwide. METHODS: Previous untrained women with BMI≥25 were allocated to either BodyPump (a high-repetition group session) (n=25), individual resistance training with a personal trainer (n=25), non-supervised individual resistance training (n=21) and non-exercising control group (n=21). Primary outcome was one repetition maximum (1RM) in squat and bench press, and secondary outcome was body composition (Inbody720). RESULTS: The BodyPump group did not improve muscle strength, compared to any of the other groups. In 1RM squat, the personal trainer group increased 17% (95% CI 5.1-23.0), 20% (95% CI 7.5-24.8) and 30% (95% CI 15.8-33.0kg) more than the non-supervised group, BodyPump and controls, respectively. In bench press the personal trainer group increased 10% (95% CI 1.5-7.2) and 16% (95% CI 3.5-9.3kg) more compared to BodyPump and controls. No difference was found compared to the non-supervised group in bench press. There were no between-group differences in body composition. CONCLUSION: Twelve weeks of BodyPump did not improve muscle strength in overweight women, but a personal trainer amplified the effects of individual resistance training on maximal strength in squat. None of the intervention groups showed effect in body composition.
Authors: Pedro Lopez; Dennis R Taaffe; Daniel A Galvão; Robert U Newton; Elisa R Nonemacher; Victória M Wendt; Renata N Bassanesi; Douglas J P Turella; Anderson Rech Journal: Obes Rev Date: 2022-02-21 Impact factor: 10.867