Several lifestyle related interventions have been investigated to treat overweight and obesity and prevent weight gain, and today a combination of energy restrictions, physical activity, and behavioral change strategies are recommended ( Donnelly et al., 2009 Laddu et al., 2011 Dombrowski et al., 2014 Samdal et al., 2017). According to the World Health Organization, 40% of the adult female population are classified as overweight and 15% as obese. The worldwide prevalence of overweight (BMI ≥ 25.0 kg/m 2) and obesity (BMI ≥ 30.0 kg/m 2) have increased considerably during the last three decades ( Ng et al., 2014 Di Cesare et al., 2016). With no group differences, the resting metabolic rate (RMR) was elevated with 15–22% 2 h after exercise.Ĭonclusion: Overweight women achieved an energy expenditure of approximately 300 kcal (4.7 kcal per min) during a single session of BodyPump, which was similar with the women performing a single session of heavy load resistance exercise. Results: The BodyPump group lifted significantly more loads than the heavy load group (19,485 kg ± 2258 vs 15,616 kg ± 2976, p = 0.006), while energy expenditure was similar with 302 kcal ± 67 and 289 kcal ± 69 in BodyPump and heavy load group, respectively ( p = 0.69). The energy expenditure was assessed with indirect calorimetry during the sessions and for two intervals at rest during the recovery phase: 0–20 and 120–140 min after the sessions. Methods: Eighteen women participated in the study (mean age 35.4 years ± 10.2, BMI 30.4 kg/m 2 ± 4.8), 10 exercising BodyPump (50–100 repetitions each muscle group) and eight performed a heavy load session (eight repetition maximum × three sets). Therefore, we herein aimed to estimate the energy expenditure during a session of BodyPump and a time-matched session of heavy load resistance training in overweight women (BMI ≥ 25.0). For individuals using exercise for body-weight management, the energy expenditure during exercise is of interest. Purpose: High-repetition, low-load resistance exercise in group class settings has gained popularity in recent years, with BodyPump as a prime example. Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway.Anne Mette Rustaden *, Christina Gjestvang, Kari Bø, Lene Annette Hagen Haakstad and Gøran Paulsen