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Kids' strength training: safe and effective?

NCT ID NCT07512570

Knowledge-focused Sponsor: Charles University, Czech Republic 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Updated 1 time

Summary

This pilot study will test whether a structured 8-week resistance training program is feasible and safe for children aged 10-14. Researchers will measure muscle quality, strength, and body composition in 31 participants. The goal is to gather data to design a larger, more definitive trial.

What this could mean

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

Active substance
Progressive Resistance Training Program
What this could lead to
If successful, this could show that resistance training is a safe and effective way to improve muscle health in children, paving the way for larger studies.
What could go wrong
This is a small pilot study with only 31 children, so results may not apply to all kids. It focuses on feasibility, not on proving health benefits.

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

About 31 people

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

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Sep 2028

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.

Ages

10 to 14 years

Sex

Anyone

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: * Children aged 10-14 years * Ability to safely participate in supervised resistance training * Written informed consent from a parent or legal guardian * Assent provided by the child participant * Willingness to comply with all study procedures and attend training sessions Exclusion Criteria: * Acute illness at the time of enrolment * Recent musculoskeletal injury or immobilisation * Chronic cardiovascular, metabolic, or endocrine disorders * Use of medications that may affect muscle composition or function * Any medical or psychological condition that may compromise safety or adherence

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As listed by the trial registrant

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

Muscle architecture Ultrasonic diagnosis

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

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    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

  • Faculty of Physical Education and Sport Charles University

    Prague, Czech Republic, 16200, Czechia

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