Presence of Pain Shows Greater Effect than Tendon Structural Alignment During Landing Dynamics.

: Eccentric loading during landing is considered a key factor in the development of patellar tendinopathy and is associated with stiff landings and patellar tendinopathy. This study aims to investigate the relationship between tendon structure, presence of pain, and sex differences in landing kinematics and kinetics during countermovement jumps (CMJ) and tuck jump tests (TJT) in professional volleyball players. : Professional volleyball players aged 18 to 30 years old (14 females and 25 males) participated in a cross-sectional study.