Altered Peak Knee Valgus during Jump-Landing among Various Directions in Basketball and Volleyball Athletes


avatar Komsak Sinsurin 1 , avatar Roongtiwa Vachalathiti 1 , * , avatar Wattana Jalayondeja 1 , avatar Weerawat Limroongreungrat 2

1 Faculty of Physical Therapy, Mahidol University, Nakhon Pathom 73170, Thailand

2 College of Sports Science and Technology, Mahidol University, Nakhon Pathom 73170, Thailand

How to Cite: Sinsurin K, Vachalathiti R, Jalayondeja W, Limroongreungrat W. Altered Peak Knee Valgus during Jump-Landing among Various Directions in Basketball and Volleyball Athletes. Asian J Sports Med.4(3):34258. doi: 10.5812/asjsm.34258.


Asian Journal of Sports Medicine: 4 (3); 195-200
Published Online: May 4, 2013
Article Type: Research Article
Received: October 13, 2012
Accepted: May 12, 2013


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 (8.84.7) direction as compared to forward (5.84.6) direction (P<0.05). The PKVA in 30 diagonal (7.54.6) and 60 diagonal (7.75.7) 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.

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