The study aims to investigate the effectiveness of these two rehabilitation methods Hop-stabilization and Bosu ball training on dynamic balance and performance in volleyball players with chronic ankle instability (CAI) in improving dynamic balance and functional performance, using metrics like the Modified Star Excursion Balance Test (SEBT), Foot and Ankle Ability Measure (FAAM), and various functional performance tests (e.g., single-limb hopping test, figure-of-8 hop test). A null hypothesis posits no significant difference between the two methods, while the alternate hypothesis suggests a measurable difference.

The study adopts an experimental design with purposive sampling, enrolling 36 participants (18 per group) aged 18-30 years, who meet specific inclusion criteria, such as a CAIT score below 24 and a history of ankle instability. Exclusion criteria include recent injuries or surgeries affecting the lower extremities. Participants are randomized into two groups: one receiving hop-stabilization training and the other Bosu ball training, with assessments conducted at baseline and six weeks. The training is for 6weeks  (3 session per week)

Statistical analysis includes descriptive statistics, the Shapiro-Wilk test for normality, and tests like the Independent T-Test, Mann-Whitney U test, or Wilcoxon signed-rank test, depending on data distribution. Results will be analyzed using SPSS 21. The study’s findings will provide insights into optimizing rehabilitation techniques for athletes with chronic ankle instability, potentially guiding future interventions.