OBJECTIVES: The purpose of this study was to compare hip and knee joint flexion angles during two- leg jump-landing task, between injured and uninjured adolescent basketball players.

METHODS: Eighteen basketball players, aged 18–25 participated in the study: nine previously knee-injured and nine fit players. The examination was carried out in the Laboratory of Performance Testing and Sports Physiotherapy at the Faculty of Health Sciences, University of Pécs in autumn, 2017. We used a three-dimensional BTS Smart DX 400 motion analyser system to notice the alteration of hip and knee joint flexion angles during landing after a two-leg take-off. We put sensor markers on the player’s limbs to observe the changing of joint flexion angles. We supposed there would not be remarkable difference between injured and uninjured limbs, case and control group flexion angles.

RESULTS: There was no demonstrable significant difference between injured (102.1°) and uninjured knee joint (105.9°) (p=0.118); injured side (124.9°) and uninjured side hip joint (127.4°) (p=0.575). Furthermore, there was no remarkable distinction among case (hip: 126.2°, knee: 104°) and control group (hip: 124.5°, knee: 98.1°) joint flexion angles during the jump phase (hip: p=0.685, knee: p=0.063). We found significant difference between injured (108.7°) and uninjured knee (116.9°) joint flexion angle (p=0.0001), plus injured side (131.1°) and uninjured side of hip joint (124.1°) flexion angle. (p=0.003), during the landing phase (hip: p=0.739, knee: p=0.168). At the same time there was no significant difference between case (hip: 127.7°, knee:112.8°) and control group (hip: 128.9°, knee: 107.6°) flexion angles at landing to the ground.

CONCLUSIONS: As a result of corresponding physiotherapy after a knee injury, there is no substantive difference between the case and the control group knee and hip flexion angles. Accordingly the injured basketball players can do a jump-landing task similarly to fit athletes.