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New exercise may ease Jumper's knee in weightlifters

NCT ID NCT07361848

Symptom relief Sponsor: Universidad Complutense de Madrid 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 This study
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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 Results may not be published yet.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)

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Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
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When the status isn't known

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First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether a long-hold isometric exercise can reduce pain and improve function in competitive weightlifters with patellar tendinopathy (jumper's knee). About 24 athletes will either do the supervised exercise or follow routine training. Researchers will measure pain, tendon health via ultrasound, and performance to see if this approach is safe and effective.

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 24 people

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

Expected to start

Feb 2027

An estimate. Start dates often move.

Expected to finish

Apr 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

18 to 45 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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. Competitive weightlifting athletes (Olympic weightlifting or CrossFit) training ≥3 times per week. 2. Age 18-45 years. 3. Symptom duration of at least 6 weeks. 4. Presence of vascularized patellar tendinopathy, defined as Doppler-detectable intratendinous neovascularization using standardized settings. 5. VISA-P score \< 80 at baseline. 6. Ability to perform loaded lower-limb exercises safely. 7. Willingness to refrain from other structured isometric interventions focused on the patellar tendon during the study period. 8. Ability to provide informed consent. 9. Sex/Gender requirement: both men and women eligible; the study includes sex-stratified analysis to examine potential sex-based differences in tendon response. Exclusion Criteria: 1. Previous knee surgery within the past 12 months. 2. Partial or complete patellar tendon rupture (confirmed clinically or by ultrasound). 3. Coexisting knee conditions (e.g., meniscal tear, ACL/PCL injury, patellofemoral joint instability) that significantly affect load tolerance. 4. Systemic diseases affecting tendon health (e.g., diabetes, rheumatoid arthritis, connective tissue disorders). 5. Corticosteroid injection in the patellar tendon within the last 6 months. 6. Participation in other clinical trials involving exercise or tendon-loading interventions. 7. Neuromuscular or medical conditions limiting safe performance of isometric or plyometric exercise. 8. Pregnancy. 9. Inability to commit to follow-up assessments at 8, 12, and 24 weeks.

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Conditions

The condition(s) this trial relates to.

patellar tendinitis

As listed by the trial registrant

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

Patellar tendinopathy / jumpers knee

How to take part

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  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

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Contacts and locations

Locations

  • Universidad Complutense de Madrid, Faculty of Nursing, Physiotherapy and Podiatry, Department of Physiotherapy

    Madrid, Madrid, 28040, Spain

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