Neuromuscular training consisting of:

• Single limb balance task.
• Balance training on an unstable surface.
• Hop drills.

This group performed the same neuromuscular training with the addition of stroboscopic glasses during the training performance.

• Single limb balance task.
• Balance training on unstable surfaces.
• Hop drills.

This group received no intervention

This intervention consisted of a supervised multimodal exercise protocol addressing different aspects of balance including static and dynamic tasks on the injured ankle. The training program comprised 6 exercises that were progressively adapted depending on the patient's execution controlled by an expert physiotherapist

Ankle dorsiflexion range of motion was assessed by the weight-bearing lunge test. The patient is positioned in a standing position facing a wall with the involved foot parallel with a tape measure which has been attached to the floor and the opposite leg placed behind in a tandem stance. A forward lunge is performed until the anterior knee tries to make contact with the wall with the heel firmly planted on the ground.

Dynamic balance has been measured by a simplified version of the Star Excursion Balance Test where the anterior, posteromedial and posterolateral reach directions were collected for statistical analysis.

To determine the severity of ankle instability the Cumberland ankle instability tool. This questionnaire is a nine items questionnaire ranged from 0 to 30 (0 related with severe impairment and 30 no subjective instability feeling) and has been reported to be a valid tool with high internal consistency and reliability.