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Jumping to safety: new test may prevent ACL Re-Injury in athletes

NCT ID NCT07297511

Knowledge-focused Sponsor: Kaohsiung Medical University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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)
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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This status has not been confirmed recently, so it may be out of date.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 vertical jump tests can better assess when athletes are ready to return to sports after ACL reconstruction. Current tests may miss hidden weaknesses that increase re-injury risk. Researchers will compare jump performance between 36 athletes who had ACL surgery and healthy controls to improve return-to-play decisions.

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 36 people

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

Expected to start

Dec 2025

An estimate. Start dates often move.

Expected to finish

Jan 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.

Who is studied

The study population consists of two distinct groups: (1) ACLR athletes: elite athletes aged 18-35 years who have undergone unilateral anterior cruciate ligament reconstruction using hamstring or gracilis autograft with a minimum of 6 months post-operative. These participants will be recruited from orthopedic clinics, sports medicine centers, and rehabilitation facilities in the region. (2) Healthy controls: age, sex, and athletic-level matched individuals aged 18-35 years with no history of lower extremity injuries, recruited from local athletic facilities, university sports programs, and community sports organizations. Both groups must have elite athlete status, defined as prior participation in national-level sports competitions. The ACLR group represents athletes in the late rehabilitation phase preparing for return-to-play, while the healthy control group serves as a reference for normal biomechanical performance.

Ages

18 to 35 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: * 1.Age 18-35 years 2.Unilateral anterior cruciate ligament (ACL) rupture confirmed by magnetic resonance imaging (MRI) 3.Positive Lachman test grade ≥2 pre-operatively 4.Anterior cruciate ligament reconstruction (ACLR) using hamstring or gracilis autograft 5.Post-operative time ≥6 months 6.Completed rehabilitation program with clearance from orthopedic surgeon or physical therapist 7.Quadriceps strength symmetry index ≥90% .Elite athlete status (prior participation in national-level competitions) Exclusion Criteria: 1. Other lower extremity injuries or pathologies (including other knee ligament injuries) 2. Contralateral lower limb injury within the past 3 months 3. Quadriceps strength symmetry index \<90% 4. Non-elite athlete status (no prior national-level competition participation) 5. Incomplete rehabilitation or lack of medical clearance

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As listed by the trial registrant

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

Acl reconstruction

How to take part

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  1. The places running it

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  2. The official record

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    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • Kaohsiung Medical University

    Kaohsiung City, Taiwan

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