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Heavy or light? study tests best exercise dose for healed achilles ruptures

NCT ID NCT06912269

Symptom relief Sponsor: Federal University of Rio Grande do Sul Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether low or moderate intensity strength training can improve ankle function, muscle strength, and tendon health in men who had an Achilles tendon rupture 1 to 5 years ago. About 67 men will be assigned to 12 weeks of calf exercises at either 55% or 70% of their max strength. The goal is to find the best exercise dose to reduce long-term deficits after injury.

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 67 people

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

Started

Oct 2024

Expected to finish

Aug 2026

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

18 to 64 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: * Men aged 18 to 64 who have ruptured their Achilles tendon unilaterally no more than 5 years ago; * Who are not performing systematic and regular calf strength training. Exclusion Criteria: * Non-surgical treatment for Achilles tendon rupture; * History of postsurgical complications (infection or re-rupture); * Presence of any type of ankle injury in the last six month; * Participation in a strength training program for plantar flexors in the last six months prior to participation in the study; * Having heart failure; autoimmune diseases; and/or diabetes; * Systematic use of antibiotics or steroids within the last 12 months; * Presence of any other clinical contraindication for performing maximum strength tests.

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As listed by the trial registrant

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

Achilles tendon rupture Neuromuscular adaptations Strength training adaptations

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

  • Exercise Research Laboratory (LAPEX) - School of Physical Education, Physiotherapy, and Dance

    RECRUITING

    Porto Alegre, Rio Grande do Sul, 90690-200, Brazil

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