ArticleFrontiers in sports and active living2026
Quadrant training: a simple typology-based approach to improve strength and endurance in youth soccer players.
Article in Frontiers in sports and active living, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Youth soccer players show heterogeneous performance profiles, yet individualized conditioning is often impractical outside professional settings. We examined whether a typology-based training allocation into four quadrants ("Quadrant Training"; QT) improves endurance- and strength-related performance compared with regular soccer training alone. Methods: Male U16-U17 players from two youth academies completed a non-randomized, longitudinal controlled intervention (academy-level and intervention effects are confounded); one academy served as intervention group ( Results: Between-group ANCOVA models using heteroscedasticity-robust standard errors showed the most precise effect for CMJ ( Discussion: QT proved feasible to implement as an individualized training framework, and effect sizes for V4 and CMJ suggested a beneficial impact on submaximal endurance capacity and explosive lower-body power. These preliminary findings warrant confirmation in adequately powered trials.
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