Effects of Fatigue and Different Jump-landing Cutting Directions on the risk of Ankle Ligament Sprains
Objective:To investigate the effects of fatigue and three different jump-landing cutting directions(forward jump,oblique jump and lateral jump)on the risk of ankle ligament sprains.Methods:A total of 15 male collegiate amateur ballplayers participated in the study.Kinematic and kinetic data were collected by using infrared motion capture system and three-dimensional force plate during three different jump-landing cutting directions between 2 different conditions(pre-vs.post-fatigue).Results:Significant differences were found in the ankle plantarflexion angle and ankle inversion angular velocity at initial contact among three different jump-landing directions,which showed that the lateral jump was the largest,and the forward jump was the smallest.Significant differences were found in the maximum ankle inversion angle,maximum ankle inversion angular velocity,maximum ankle inversion moment and maximum vertical ground reaction force in the landing phase among three different jump-landing directions,which showed that the lateral jump was the largest,and the forward jump was the smallest.No differences in kinematic and kinetic variables were observed between pre-and post-fatigue among three jump-landing directions.Conclusion:Different jump-landing cutting directions can affect ankle movement patterns,and increased jump-landing cutting angles may lead to a higher risk of ankle sprains.Fatigue may not increase the risk of ankle injury in men with jump-landing cutting movements.
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