Comparative changes in cardiovascular measures following speed, agility, and quickness training and small-sided games in youth football players: a randomized trial

Backgroun Speed, Agility, and Quickness (SAQ) training and small-sided games (SSGs) are widely used in youth football but impose different physical and football-specific demands. Evidence directly comparing their cardiovascular responses following a structured training intervention remains limited. Objective To compare cardiovascular response patterns following an 8-week SAQ or SSG training programme in male youth football players. Methods Thirty-six male youth football players were randomly allocated to an SAQ group ( n = 18) or an SSG group ( n = 18). Cardiovascular outcomes were assessed before and after the 8-week intervention and included resting heart rate (HR), post-shuttle-run HR, systolic blood pressure (SBP), and diastolic blood pressure (DBP). Pre-to-post changes were examined using a two-way mixed-design analysis of variance, with time as the within-subject factor and group as the between-subject factor. Results Both groups demonstrated reductions in all four cardiovascular outcomes. Significant time × group interactions were observed for resting HR, post-shuttle-run HR, SBP, and DBP. SSG training produced greater numerical reductions in resting HR, SBP, and DBP, whereas SAQ training produced a slightly greater reduction in post-shuttle-run HR. Conclusion The findings indicate different cardiovascular response patterns following SAQ and SSG training rather than universal superiority of either modality. SSGs may be useful when cardiovascular conditioning is integrated with football-specific technical and tactical demands, whereas SAQ training provides a more targeted stimulus for acceleration, agility, and neuromuscular performance. Trial registration ClinicalTrials.gov NCT07633210, registered on 03/06/2026. Retrospectively registered.