García-Hermoso A, Alonso-Martínez AM, Ramírez-Vélez R, et al. - Via performing this systematic review and meta-analysis, researchers examined if quality- or quantity-based physical education interventions is associated with improvement in health-related physical fitness and fundamental motor skills in youth. The meta-analysis was performed on 56 trials involving 48,185 youths (48% girls). Small increases in fitness components and fundamental motor skills were reported in correlation with quality-based physical education interventions; this was observed regardless of frequency or duration of physical education lessons. By contrast, small increases in only fitness components were observed in correlation with quantity-based interventions. Findings thereby suggest association of quality-based physical education strategies with improved class efficiency assuming typical school constraints (eg, reduced practice time per session).