Author/Authors :
Sinsurin, Komsak Faculty of Physical Therapy - Mahidol University, Nakhon Pathom 73170, Thailand , Vachalathiti, Roongtiwa Faculty of Physical Therapy - Mahidol University, Nakhon Pathom 73170, Thailand , Jalayondeja, Wattana Faculty of Physical Therapy - Mahidol University, Nakhon Pathom 73170, Thailand , Limroongreungrat, Weerawat College of Sports Science and Technology - Mahidol University, Nakhon Pathom 73170, Thailand
Abstract :
Purpose: Excessive knee valgus during landing tasks is a contributing factor to
knee injuries. Most studies have examined lower extremity biomechanics
during the forward direction of a jump-landing task. Athletes perform many
movements in the air and land in multi-directions. Therefore, the purpose of
this study was to assess the peak knee valgus angle (PKVA) during one leg
jump-landing in various directions.
Methods: Eighteen male basketball and volleyball athletes participated in the
study. Participants performed one leg jump-landing tests from a 30 cm height
platform in four directions. Knee valgus motion was measured using Vicon™
motion system. The data were analyzed with repeated measures ANOVA.
Results: Direction significantly (P<0.001) influenced the PKVA during landing.
Significantly higher PKVA was observed for the lateral (8.8°±4.7°) direction as
compared to forward (5.8°±4.6°) direction (P<0.05). The PKVA in 30° diagonal
(7.5°±4.6°) and 60° diagonal (7.7°±5.7°) directions was higher than in the
forward direction (P<0.05).
Conclusion: One leg jump-landing in lateral and diagonal directions results in a
higher PKVA compared to landing in a forward direction and could lead to a
higher risk of knee injury.
Keywords :
Risk of Knee Injury , Basketball and Volleyball , Knee Valgus Angle , Jump-Landing
