Identification of Kinematic Variables Specific of Patellar Tendinopathy in Athletes at Risk

This research aims to identify and monitor specific kinematic markers associated with patellar tendinopathy in athletes at risk. Using a markerless motion capture system, vertical jump tests will be analyzed to detect early biomechanical changes in the knees, hips, trunk, and ankles. By comparing injured participants, the study seeks to improve early diagnosis and personalized prevention strategies for patellar tendinopathy.

* Subject aged between 18 and 45 years * Male subject * Regularly participating in physical activity involving jumping (a predisposing factor for patellar tendinopathy) twice a week for at least one year. * Participants affiliated with or covered by a social security scheme SPECIFIC INCLUSION CRITERIA FOR THE PATELLAR TENDINOPATHY GROUP Patients with at least 2 of the following 3 criteria: * Modified Öhberg score ≥2 according to L Öhberg, H Alfredson (2002) * VISA-PF \< 80/100 according to Kaux et al. (2016) and/or OSTRC P ≥ 6/100 according to Owoeye et al. (2018) * Single Leg Decline Squat (SLDS): VAS ≥ 1/10 with pain mapping at the patellar tendon; according to Coombes et al. (2020) SPECIFIC INCLUSION CRITERIA FOR THE HEALTHY GROUP Patients with 0 or 1 of the following 3 criteria: * Modified Öhberg score ≥2 according to L Öhberg, H Alfredson (2002) * VISA-PF \< 80/100 according to Kaux et al. (2016) and/or OSTRC P ≥ 6/100 according to Owoeye et al. (2018) * Single Leg Decline Squat (SLDS): VAS ≥ 1/10 with pain mapping at the patellar tendon; according to Coombes et al. (2020) Non inclusion Criteria: * Significant medical and surgical history involving the lower limbs (e.g., ACL ligament reconstruction, meniscectomy, etc.) * Contraindications to participating in sports activities * Other pathologies involving the lower limbs (\< 6 months), e.g., torn knee ligaments, ankle sprain, knee sprain, etc. * Participants who have not given their informed consent * Participants subject to legal protection measures (legal guardianship, conservatorship, curatorship) * Participants deprived of their liberty by judicial or administrative decision