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Soccer study: does playing more preseason friendlies boost or bust performance?

NCT ID NCT07170930

Knowledge-focused Sponsor: Emmanouil D. Zacharakis 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026 · Updated 1 time

Summary

This study tracks 24 male soccer players through preseason to see how different amounts of friendly match play affect their fitness, muscle damage, and inflammation. Players are split into groups based on how much they play in 8 friendly games. Researchers measure things like jump height, sprint time, blood markers, and muscle stress. The goal is to understand how to best prepare players for the season.

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.

Participants

About 24 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2025

Expected to finish

Sep 2025

An estimate. End dates often move.

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.

Who is studied

All participants are highly active soccer players (i.e., \>1000 MET-min·week-¹) and compete at national-level standards.

Ages

18 to 35 years

Sex

Male participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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 participants * Aged 18 years or older * Non-smokers * Injury-free for the past 6 months * Medication-free for the past 6 months * Abstinent from alcohol * Living at an altitude below 1500 meters * Committed exclusively to soccer (no participation in other sports) Exclusion Criteria: * History of serious injuries (e.g., fractures, ligament tears) within the past 6 months * Chronic medical conditions such as cardiovascular disease, diabetes, or respiratory disorders * Current use of performance-enhancing drugs or supplements * Participation in non-soccer-related sports or activities during the study period

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Conditions

The condition(s) this trial relates to.

Inflammation inflammatory disease

As listed by the trial registrant

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

Athletic performance Exercise physiology Exercise test Exercise-induced inflammation Inflammation Muscle damage Physical fitness Pre-season training SOCCER

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • School of Physical Education and Sports Science, National and Kapodistrian University of Athens

    Athens, Daphni, 17237, Greece

More trials for these conditions

Other studies related to the condition(s) this trial covers.