(English) Episode 250-Why Jumper’s Knee Becomes Permanent

The provided source is a longitudinal study examining how the proximal patellar tendon develops in adolescent athletes between the ages of 11 and 15. The research highlights that improvements in tendon structure are more significantly linked to an individual’s maturation status, such as years from peak height velocity, rather than their chronological age. Using ultrasound tissue characterisation, the authors tracked changes in tendon echotypes over 2.5 years to identify critical periods of skeletal development. The findings suggest that while most athletes show subtle structural improvements as they mature, a small percentage develop hypoechoic areas or disorganisation that persists despite continued high athletic loading. Ultimately, the study emphasizes that skeletal maturity is a vital marker for managing tendon health and preventing patellar tendinopathy in young sporting populations. This research presents a challenge for practitioners who must manage diverse maturation levels within teams organized by age.(Harris M, Rio EK, Docking S, Cook JL, Hannington MC, Bonello C, et al. Maturation of the proximal patellar tendon structure in the adolescent athlete: a longitudinal study. J Sci Med Sport [Internet]. 2025; Available from: http://dx.doi.org/10.1016/j.jsams.2025.11.015)