Ankle sprains are common injuries in active young people. Most of these injuries recovery quickly on their own, do not require imaging, and do better with early motion and rehabilitation. High ankle sprains and fractures are much less common but more serious. They may require imaging and more treatment.

Phases of rehabilitation for ankle sprain Phase I treatment involves resting and protecting the ankle to permit healing, to prevent further injury, and to control pain and swelling.

Phase II treatment begins once pain and swelling have subsided to the point where the athlete can comfortably bear weight and walk from place to place.

Virtual reality (VR) is a simulated experience that can be similar to or completely different from the real world. Applications of virtual reality can include entertainment (i.e. video games) and educational purposes (i.e. medical or military training). Other, distinct types of VR style technology include augmented reality and mixed reality.

Biodex Balance Training is one of the main tool that used to assess dynamic balance and dynamic limits of stability also it can used as training tool to improve the participant balance training

Inclusion Criteria:

1. Children will have sustained lateral ankle sprain (grade II).
2. Their age was ranging from 13-16 years
3. All children with stable medical and psychological status.
4. They will able to follow the verbal commands or instructions during testing.

Exclusion Criteria:

1. Children with ankle or foot deformity
2. Unstable medical and psychological status.
3. Children not able to follow the verbal commands or instructions during testing
4. Children with any disorder affecting balance.

90 boys were recruited and assesseted for eligability then randomly divided into 3 groups each one included 30 boy

Single (Outcomes Assessor) Blinding process to participants and care providers was impossible due to the nature of intervention therapy. Data were analyzed by an impartial statistician (outcomes assessor), referring to each arm with an encoded name: Group 1 (control group) and Group 2 (virtual reality group), group 3 (Biodex Balance Training)