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

NCT07418892 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 44

Last updated 2026-02-18

No results posted yet for this study

Summary

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.

Conditions

  • Sprint Force-Velocity-Power Profile
  • Football (Soccer) Sprint Performance

Interventions

OTHER

Resisted Sprint Training

20 m maximal sprints towing a sled loaded to 20% of individual body mass (sled tare 3 kg; plates added). 3 sets × 5 repetitions, 45 s inter-rep rest, 3 min inter-set rest; two supervised sessions/week for six weeks, conducted at the start of squad training, on the same artificial-turf surface.

OTHER

Unresisted Sprint Training

20 m maximal sprints without external resistance; dose and rest schedule identical to RST (3 × 5 × 20 m; 45 s; 3 min); two sessions/week for six weeks; same surface and session placement; standard team training continues.

Sponsors & Collaborators

  • Universidad de Antioquia

    collaborator OTHER

  • Federal University of Vicosa

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
13 Years
Max Age
17 Years
Sex
MALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2024-08-01
Primary Completion
2024-09-20
Completion
2024-09-20

Countries

  • Colombia

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07418892 on ClinicalTrials.gov