Grgic J, et al. - This systematic review aimed to aggregate findings and interpret the studies that evaluated chronic muscular strength adaptations to resistance training interventions involving different rest interval (RI) durations and to provide evidence-based recommendations for exercise practitioners and athletes. The authors revealed that even with short RIs (< 60 s), robust gains in muscular strength could be achieved. However, in resistance-trained individuals, it seemed that longer duration RIs (> 2 min) were required to maximize strength gains. It appeared that short to moderate RIs (60–120 s) were sufficient for maximizing muscular strength gains with regard to untrained individuals.