Patellar tendinopathy (PT) is the common cause of anterior knee pain, particularly in sports required repeated jumping and landing, such as volleyball. PT clinically presents as anterior knee pain and localized tenderness at the patellar tendon. To evaluate the severity of symptoms of PT, the VISA-P questionnaire is a self-administered, well-validated, and widespread assessment tool. In the long term, athletes would land with knee avoidance patterns and transfer the load to the hip joint caused further hip-related injury. Lower extremities eccentric exercise has been proven the most beneficial treatment of PT. However, the course lasts for three to six months. For athletes who are still in season, it's difficult to get the immediate effect. A newly developed biomechanical taping, dynamic tape, considered to be beneficial for load absorption during muscle eccentric contraction during landing and further normalized the lower extremities load contribution by its viscoelasticity property. However, no past research has confirmed this effect. Therefore, the aims of the study are to translate the English VISA-P questionnaire to the Chinese and to study the reliability and validity of the Chinese version. In the next part, the investigators investigate the different landing biomechanics between individuals with and without patellar tendinopathy and establish the reliability of different landing tasks, and further explore whether the dynamic tape alters landing biomechanics in volleyball players.
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lower extremities joint angle
Timeframe: pre-intervention
lower extremities joint angle
Timeframe: immediately after the intervention
lower extremities joint angular velocity
Timeframe: pre-intervention
lower extremities joint angular velocity
Timeframe: immediately after the intervention
lower extremities joint angular acceleration
Timeframe: pre-intervention
lower extremities joint angular acceleration
Timeframe: immediately after the intervention
ground reaction force
Timeframe: pre-intervention
ground reaction force
Timeframe: immediately after the intervention
lower extremities joint force
Timeframe: pre-intervention
lower extremities joint force
Timeframe: immediately after the intervention
lower extremities joint moment
Timeframe: pre-intervention
lower extremities joint moment
Timeframe: immediately after the intervention
lower extremities joint power
Timeframe: pre-intervention
lower extremities joint power
Timeframe: immediately after the intervention
time to peak ground reaction force
Timeframe: pre-intervention
time to peak ground reaction force
Timeframe: immediately after the intervention
loading rate of ground reaction force
Timeframe: pre-intervention
loading rate of ground reaction force
Timeframe: immediately after the intervention
net joint work
Timeframe: pre-intervention
net joint work
Timeframe: immediately after the intervention
patellar tendon force
Timeframe: pre-intervention
patellar tendon force
Timeframe: immediately after the intervention