This study aimed to evaluate the metabolic responses during a whole-body strength training (WBST) session and to test the effects of a 8-week WBST program on metabolic adaptations and body composition. Oxygen consumption ( ), and the rate of lipid oxydation (LipOx) were measured during both WBST and walking incremental exercises. Metabolic responses during walking, body composition, and anthropometric characteristics were measured before and after the WBST training period. was similar during a WBST session performed at 80% of MVC (15.4 ± 3.9 ml/min/kg), and during walking at 4.5 km/h (16.8 ± 2.0 ml/min/kg). During walking at 4.5 km/h, LipOx did not differ before (0.47 ± 0.20 g/min) and after training (0.43 ± 0.11 g/min), while was significantly reduced (-7.2 ± 10.4 %; p<0.01) after the WBST program. Waist circumference, supra-iliac skinfold thickness, and body fat percentage were also significantly (p<0.001, p<0.01and p<0.01 respectively) reduced after training. This study demonstrated that a WBST session, performed at 80 % of MVC, induced a significant aerobic solicitation and that a 8-week WBST program positively influenced body composition, anthropometric characteristics, and energetic cost of walking. These findings suggest that WBST may be an interesting alternative to combined aerobic and strength training strategies in overweight management.