Status:
NOT_YET_RECRUITING
Long-Hold Yielding Isometric Exercise for Patellar Tendinopathy in Weightlifting Athletes
Lead Sponsor:
Universidad Complutense de Madrid
Conditions:
Patellar Tendinopathy / Jumpers Knee
Eligibility:
All Genders
18-45 years
Phase:
NA
Brief Summary
The goal of this clinical trial is to evaluate whether a long-hold yielding isometric exercise program improves pain, tendon vascularity, mechanical properties, and functional performance in weightlif...
Detailed Description
This randomized controlled trial is part of the QuantFlow research program, a multidisciplinary initiative designed to advance the understanding of patellar tendon pathology through the integration of...
Eligibility Criteria
Inclusion
- Competitive weightlifting athletes (Olympic weightlifting or CrossFit) training ≥3 times per week.
- Age 18-45 years.
- Symptom duration of at least 6 weeks.
- Presence of vascularized patellar tendinopathy, defined as Doppler-detectable intratendinous neovascularization using standardized settings.
- VISA-P score \< 80 at baseline.
- Ability to perform loaded lower-limb exercises safely.
- Willingness to refrain from other structured isometric interventions focused on the patellar tendon during the study period.
- Ability to provide informed consent.
- Sex/Gender requirement: both men and women eligible; the study includes sex-stratified analysis to examine potential sex-based differences in tendon response.
Exclusion
- Previous knee surgery within the past 12 months.
- Partial or complete patellar tendon rupture (confirmed clinically or by ultrasound).
- Coexisting knee conditions (e.g., meniscal tear, ACL/PCL injury, patellofemoral joint instability) that significantly affect load tolerance.
- Systemic diseases affecting tendon health (e.g., diabetes, rheumatoid arthritis, connective tissue disorders).
- Corticosteroid injection in the patellar tendon within the last 6 months.
- Participation in other clinical trials involving exercise or tendon-loading interventions.
- Neuromuscular or medical conditions limiting safe performance of isometric or plyometric exercise.
- Pregnancy.
- Inability to commit to follow-up assessments at 8, 12, and 24 weeks.
Key Trial Info
Start Date :
February 1 2027
Trial Type :
INTERVENTIONAL
Allocation :
ESTIMATED
End Date :
April 1 2028
Estimated Enrollment :
24 Patients enrolled
Trial Details
Trial ID
NCT07361848
Start Date
February 1 2027
End Date
April 1 2028
Last Update
January 23 2026
Active Locations (1)
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1
Universidad Complutense de Madrid, Faculty of Nursing, Physiotherapy and Podiatry, Department of Physiotherapy
Madrid, Madrid, Spain, 28040