Effects of Resisted Versus Unresisted Sprint Training on Sprint Force-Velocity Profile in Youth Footballers

This randomised, controlled, two-arm trial evaluates whether light resisted sprint training (sled towing at 20% of body mass) produces superior improvements in 30 m sprint mechanical outputs compared with matched-dose unresisted sprint training in youth footballers. Participants complete two supervised sessions per week for six consecutive weeks, integrated into normal academy microcycles on the same artificial-turf surface. Primary outcomes are changes in sprint-derived force-velocity-power profile parameters and 30 m sprint performance, with secondary outcomes including countermovement jump height and anthropometrics.

NCT Number	NCT07418892
Lead Sponsor	Federal University of Vicosa Collaborators: Universidad de Antioquia
Conditions	Sprint Force-Velocity-Power Profile, Football (Soccer) Sprint Performance
Enrollment	44 participants
Start Date	2024-08-01
Primary Completion	2024-09-20 (estimated)
Study Completion	2024-09-20 (estimated)
Updated on ClinicalTrials.gov	2026-02-18