this study will be conducted to investigate the effect of muscular fatigue on lower limb kinematics during single-leg drop landing in female professional volleyball players using a mobile-based motion analysis application.
Female volleyball players aged 20-25 years
Practice professional volleyball training or competition experience of at least 2 years
typically engage in a high volume of training, with regular participation in at least five training sessions per week
Willingness to adhere to fatigue protocol and provide informed consent
Current or recent (within the past 6 months) lower limb injury or medical condition
History of lower limb surgeries
Neurological disorders or balance impairments .
Experiencing pain or discomfort during jumping or landing tasks