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Hidden weakness after ACL surgery revealed by jump test

NCT ID NCT07448064

Knowledge-focused Sponsor: Haute Ecole ARC Sante Source: ClinicalTrials.gov ↗

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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

Summary

This study looked at how people produce force during a vertical jump about six months after anterior cruciate ligament (ACL) reconstruction. Researchers compared 100 participants — some who had ACL surgery and some healthy — to see if strength differences between legs persist even after standard rehab. By measuring force on a platform during a simple jump, the goal is to improve return-to-sport decisions and reduce reinjury risk.

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

100 people

The number who actually took part.

Started

Mar 2022

Finished

Mar 2025

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

The study population includes adults aged 18 to 40 years. The post-anterior cruciate ligament reconstruction cohort consists of individuals who underwent primary reconstruction using a hamstring tendon autograft and are evaluated between 5 and 7 months after surgery, following completion of standard rehabilitation and medical clearance for functional testing. The healthy control cohort includes recreationally active individuals with no history of anterior cruciate ligament injury, no prior lower limb surgery, and no lower extremity injury within the past 12 months. All participants must be able to perform maximal effort jumping and isokinetic strength testing.

Ages

18 to 40 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: * Post-Anterior Cruciate Ligament Reconstruction Cohort: Age between 18 and 40 years Primary anterior cruciate ligament reconstruction using a hamstring tendon autograft Assessment performed between 5 and 7 months post-surgery Completion of standard postoperative rehabilitation Medical clearance for functional testing Ability to perform maximal effort jumping and strength testing Healthy Control Cohort: Age between 18 and 40 years Recreationally active (minimum two sessions of physical activity per week) No history of anterior cruciate ligament injury No lower limb surgery No lower extremity injury within the past 12 months No current knee pain or functional limitation Exclusion Criteria: * Previous anterior cruciate ligament reconstruction on either knee (except the index surgery for the ACL group) Concomitant ligament reconstruction (e.g., posterior cruciate ligament, medial collateral ligament, lateral collateral ligament) Symptomatic meniscal repair limiting full participation in testing Neurological disorders affecting lower limb function Inflammatory joint disease Pregnancy Inability to perform maximal effort testing

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Conditions

The condition(s) this trial relates to.

Anterior Cruciate Ligament Injuries

As listed by the trial registrant

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

Anterior cruciate ligament injury Anterior cruciate ligament reconstruction rehabilitation

Contacts and locations

Locations

  • Haute Ecole ARC

    Delémont, Switzerland

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