ArticleThe Knee2021
Patellar mobility and lower limb kinematics during functional activities in individuals with and without patellar tendinopathy.
Article in The Knee, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06451120 (Study of Platelet Rich Plasma), which is not on this map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Study of Platelet Rich Plasma (PRP) Injections With Symptomatic Knee Osteoarthritis for Biomarker Exploration in Young and Old Human Subjects
Who cites it
3 citing papers in PubMed, 10 citations in OpenAlex.
- Optimizing landing mechanics to modulate patellar tendon loading: An individualized moment arm analysis.iScience · 2026Article
- Fascial Pathophysiology in Hypermobility Spectrum Disorders and Hypermobile Ehlers-Danlos Syndrome: A Review of Emerging Evidence.International journal of molecular sciences · 2025Review
- The Patellostabilometer: A New Device for Quantification of Mediolateral Patella Displacement.Sensors (Basel, Switzerland) · 2023Article
Corrections and comments
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
Abstract
STUDY
designCase-control.
objectiveTo examine whether patients with patellar tendinopathy (PT) display greater patellar mobility and different lower body kinematics than patients without PT.
backgroundPT is a common overuse condition of the patellar tendon that can cause pain and impair function. Subjects with overuse knee problems display different hip and knee functional mechanics, specifically valgus collapse. Patellar hypermobility has not been specifically studied as a possible risk factor for PT.
methods11 patients with PT and 11 controls without PT, age 18 to 40, were studied. Using a patellofemoral arthrometer (PFA), maximal lateral and medial patellar displacement was measured. 3-D motion analysis was performed to determine lower extremity joint motions during single-leg step down and drop vertical jump tests.
resultsPatients with PT had significantly increased lateral patellar mobility compared to controls (12.21 ± 3.33 mm vs. 9.19 ± 1.92 mm, P = .017). PT patients showed significantly greater peak hip adduction with both drop vertical jump (2.7° ± 6.3° vs. -5.6° ± 4.2°; P = .003) and step down (17.0° ± 3.8° vs. 12.5° ± 4.4°, P = .024). PT patients demonstrated increased peak ankle external rotation with drop vertical jump (-21.1° ± 5.9° vs. -14.8° ± 5.5°, P = .023) and step down (-15.6° ± 5.5° vs. -9.0° ± 6.0°, P = .017).
conclusionsPatients with PT exhibit increased lateral patellar mobility, hip adduction, and ankle external rotation. The effects of increased patellar mobility deserve further study in the development, management, and prevention of PT.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.