PatellarTendinopathy
Conditions
Interventions
PatellarTendinopathy group:None
control group:None
Sponsors
Beijing Sport University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Identity: Full-time undergraduate volleyball student-athlete at Beijing Sport University, holding a national athlete level of Grade 2 or above, with at least three years of specialized training experience. 2. Health status: Patellar tendinopathy group: Clinically diagnosed or ultrasonographically confirmed patellar tendinopathy, with symptoms persisting for more than three months, but able to tolerate completing the spiking movement at the time of testing. Control group: Lower-limb healthy, with no history of patellar tendon pain or other serious bone/joint injuries in the past year. 3. Athletic level and ability: Possesses high-level, volleyball-specific skills, and is able to complete standardized spiking tests and related morphological measurements safely and properly under the researcher's guidance. 4. Voluntary participation: Willing to complete the experimental procedures as required (e.g., 3D motion capture, morphological measurements, questionnaires, etc.) and has signed the informed consent form. 5. Behavioral control: Able to refrain from intense training for 24 hours prior to testing, maintain adequate sleep, and avoid intake of caffeine, alcohol, or other substances that may affect neuromuscular performance
Exclusion criteria
Exclusion criteria: Acute injury or interference: Presence of an acute lower-limb injury other than patellar tendinopathy within the past six months (e.g., ACL rupture, severe ankle sprain, meniscal tear, etc.), or any pain that may affect test performance at the time of testing. Surgical history: Previous surgical treatment on any major lower-limb joint (hip, knee, ankle) that may have significantly altered the original biomechanical characteristics. Other systemic diseases: Presence of cardiovascular, respiratory, vestibular, or neurological diseases that, in the researcher's judgment, would make it inappropriate for the participant to perform high-intensity jumping and landing tests. Medication and interventions: Currently receiving medication or special physical interventions that may affect muscle function, pain perception, or neuromuscular excitability. Anatomical abnormalities: Obvious lower-limb deformities or severe anatomical variations that may interfere with morphological measurements. Insufficient cooperation: Inability to understand the experimental instructions, cooperate with marker placement or the 3D motion capture process, or judged by the researcher to be unable to complete the tests safely. Data quality: Experiencing significant discomfort or withdrawing during the experiment, or critical kinematic/kinetic data being severely missing (e.g., excessive marker occlusion) that precludes subsequent analysis. Other conditions: Any other special circumstances that the researcher deems unsuitable for inclusion in this study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Patellar Tendon Thickness and Echogenic Characteristics;hip flexion angle;Knee Flexion–Extension Angle;Ankle Flexion Angle;Hip Joint Angular Velocity;Ankle Joint Angular Velocity;Knee Valgus Angle at Initial Contact;Knee Joint Angular Velocity; | — |
Secondary
| Measure | Time frame |
|---|---|
| Daily Status Questionnaire;VISA-P Patellar Tendon Functional Subscale Score; | — |
Countries
China
Contacts
Public ContactZhou yuting
Beijing Sport University
Outcome results
None listed