Lateral ankle sprains are among the most common musculoskeletal injuries. Approximately 40% of individuals who have ever suffered any lateral ankle sprain will develop chronic ankle instability which is defined as posterior mechanical and functional deficits in this joint.~Balance is the process that maintains the center of gravity within the body's support base, which needs constant adjustments with joint positioning and muscular activity. Many musculoskeletal and nervous system diseases can alter balance control. It has been reported that individuals with CAI have poor static and dynamic balance compared to those with normal ankles, and this affection of balance, increases the falling risks and leads to serious injuries.~A reversal of normal walking is simply recognized as retro-walking or backward walking (BW), where the toes first reach the ground and finish with the heel off. BW training causes changes in the motion control system and gait characteristics and exerts a positive effect on postural stability.~Forty-eight patients with chronic ankle instability will be assigned randomly into 3 equal groups; group A will receive BW training in addition to the traditional physical therapy program for 3 sessions/ week, over 6 weeks periods, Group B: will receive balance training on Biodex balance system in addition to the traditional physical therapy program for 3 sessions/ week, over 6 weeks periods, group C: will receive the traditional physical therapy program only for 3 sessions/ week, over 6 weeks periods.
The goal of this clinical trial is to investigate the effect of backward walking versus balance training in patients with chronic ankle instability. The main question it aims to answer is:~Is there a difference between the effect of balance training and BW training on balance, ankle proprioception, risk of fall, and functional limitations in CAI patients?