Patellar tendinopathy (PT) is an overuse injury associated with loading activities, and popular among basketball and volleyball players. Although altered biomechanical characteristics during landing has been suggested as one of the risk factors for the development of PT, previous evidence failed to show the link between the sagittal plane biomechanics of the hip and knee joint and PT; and little was known about the frontal and horizontal plane biomechanics in athletes with PT. While other factors such as motor control or muscle activation also have not been explored fully. The purpose of this study is to compare hip motor control and biomechanical characteristics of the hip and knee joint during landing in athletes with and without symptomatic PT.
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Hip Flexion Angles
Timeframe: In the experiment, the maximum knee flexion during the landing phase of the countermovement jump
Maximal Knee Flexion Angle
Timeframe: The landing phase of the countermovement jump in the experiment
Hip Abduction Angle
Timeframe: In the experiment, the maximum knee flexion during the landing phase of the countermovement jump
Knee Joint Flexion Angle
Timeframe: the contralateral foot is at its lowest point in step-down test in the experiment
Motor Control Ability
Timeframe: during the experiment, up to 4 hours