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Sled towing or free sprints: which boosts young Footballers' performance?

NCT ID NCT07418892

Knowledge-focused Sponsor: Federal University of Vicosa Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether sprinting with a light sled (resisted) or without resistance (unresisted) improves sprint speed and jumping ability more in young male footballers aged 13-17. Forty-four players did two sessions per week for six weeks. The goal was to see which training method leads to better sprint and jump performance.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
resisted sprint training (sled towing at 20% body mass) and unresisted sprint training
What this could lead to
If it works, this could point toward more effective training methods for young football players.
What could go wrong
This is a small, completed study in a specific group (male youth footballers), so results may not apply to other athletes or ages.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

44 people

The number who actually took part.

Started

Aug 2024

Finished

Sep 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

13 to 17 years

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Male football (soccer) player aged 13 to 17 years. * Registered Under-14 or Juvenile player in an organized football program/club/league. * At least 1 year of organized football experience. * Current health-system affiliation (e.g., EPS). * Provided informed assent; parent/guardian provided written informed consent (for minors). * Able to attend and comply with the sessional training and testing protocol. Exclusion Criteria: * Current musculoskeletal complaint or injury at baseline. * Ongoing rehabilitation at baseline. * Logistical constraints preventing participation in the sessional protocol (e.g., inability to attend required sessions/assessments). * Injury incurred during the intervention that prevents safe continuation (participant will be withdrawn).

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Football (soccer) sprint performance Sprint force-velocity-power profile

Contacts and locations

Locations

  • Universidad de Antioquia

    Medellín, Antioquia, 054080, Colombia

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