Assessment of Intrinsic Risk Factors for Ankle Injuries in Ballet Dancers

Condition(s) studied

Study summary

This study aims to evaluate intrinsic risk factors (muscle strength, joint range of motion, static and dynamic balance) that may lead to ankle injuries in ballet dancers and to examine the relationship between these factors and ankle injuries experienced in the last 12 months. By comparing ballet dancers who have suffered injuries requiring physical therapy or forcing them to take a break from dancing for more than one week in the past year with uninjured ballet dancers and a control group, the findings aim to contribute scientifically to the development of individualized rehabilitation programs and the safe and effective planning of return-to-stage processes. Furthermore, it is believed that these data may support the reduction of time and financial losses among dancers.

Eligibility

Primary outcome measure(s)

• Ankle muscle strength — baseline(single assessment session; Day 1)
  Isokinetic peak torque of the ankle muscles will be assessed using an isokinetic dynamometer (Isomed 2000). Plantar flexion / dorsiflexion (PF/DF): measured at 30°/s and 120°/s angular velocities, in both concentric and eccentric modes. Inversion / eversion (INV/EV): measured at 60°/s and 90°/s angular velocities, in both concentric and eccentric modes. Units: Newton-meters (Nm).
• Dynamic Balance Ability — baseline(single assessment session; Day 1)
  Dynamic balance: Y-Balance Test (Lower Quarter). Reach distances in the anterior, posteromedial, and posterolateral directions will be normalized to leg length. A composite score will be calculated. Units: Reach distances (ANT, PM, PL): centimeters (cm) Composite score: percent of leg length (%) Directional asymmetries: centimeters (cm)
• Range of Motion (ROM) of the Ankle and First Metatarsophalangeal (1st MTP) Joint — Baseline (single assessment session; Day 1)
  Active joint range of motion will be measured with a universal goniometer. Ankle: dorsiflexion, plantar flexion, inversion, eversion. 1st MTP joint: dorsiflexion, flexion Units: Degrees (°).
• Static Balance Ability — baseline(single assessment session; Day 1)
  Static balance: Center of pressure (CoP) trace length, sway area, and mean CoP velocity will be recorded during 30-second quiet stance (feet hip-width apart) using a pedobarography system. Units: Millimeters (mm), square millimeters (mm²), millimeters per second (mm/s).

Trial sites (1)

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