The Effect of Muscular Fatigue on Lower Limb Kinematics During Single-Leg Drop Landing in Female Athletes

Обзор

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.

Подробное описание

Muscular fatigue impairs neuromuscular control and alters lower limb kinematics during dynamic tasks such as landing, increasing the risk of injury. For example, repetitive jump-landing tasks, as frequently performed in volleyball, have been shown to induce progressive changes in lower limb biomechanics, including reduced ankle plantarflexion and altered knee alignment, which may compromise energy absorption and joint stability.Female athletes face a higher incidence of knee and ligament injuries than males, including ACL tears and ankle sprains, due to sex-specific biomechanical and neuromuscular characteristics such as reduced hamstring activation, increased joint laxity, and altered landing mechanics .Markerless, smartphone-based systems such as OpenCap provide a validated, cost-effective, and field-based solution for 3D kinematic analysis.By applying OpenCap to evaluate the effects of muscular fatigue on single-leg drop landing in professional female volleyball players, this study aims to detect early deviations in movement patterns that may predispose athletes to injury. These findings can inform preseason screening and guide the development of tailored neuromuscular training programs, contributing to context-specific, sex-informed injury prevention strategies in female sport

Вмешательства

• Другое fatigue protocol
  Before formal testing, participants will perform a five-minute warm-up replicating their usual pre-volleyball training routine. Following the warm-up, the single-leg drop landing (SLDL) task will be clearly explained and demonstrated to all participants.Stand barefoot on both legs on a 30 cm box, then extend the testing leg forward. They will then step off the box using the testing leg, land on the same leg with a toe-heel landing pattern. After familiarization, participants will perform three t

Первичные конечные точки

• hip range of motion [Срок оценки: up to one day]
• knee flexion range of motion [Срок оценки: up to one day]
• ankle dorsiflexion range of motion [Срок оценки: up to one day]
• knee valgus angle [Срок оценки: up to one day]

Критерии участия

Критерии включения

• 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

Критерии исключения

• 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
• Body mass index (BMI) greater than 30 kg/m²
• Inability to comply with the fatigue protocol or follow instructions for the landing tasks

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Да

Дизайн исследования

Распределение

Не применимо

Модель

Одна группа

Маскирование

Открытое

Основная цель

Диагностика

Центры проведения

Список центров уточняется — проверьте первичный протокол.

Идентификаторы

NCT: NCT07648537 · P.T.REC/012/0067282

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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