Different Pressure Tissue Flossing Combined With Exercise for Chronic Ankle Instability

Inclusion Criteria: * Young adults aged 18 to 30 years. * History of at least one recurrent ankle sprain or repeated episodes of ankle giving way in the affected limb. * Subjective ankle instability, with or without pain, swelling, or activity limitation. * Reduced balance ability, movement ability, or foot and ankle function on screening assessment. * Symptoms lasting at least 6 months. * No recent structured ankle rehabilitation before enrollment. * No plan for vigorous additional exercise during the intervention period. * Willing to participate and able to provide informed consent. Exclusion Criteria: * Latex allergy or intolerance to floss band material. * Previous ankle dislocation, fracture, complete ligament rupture, or other severe structural injury. * Most recent ankle sprain within 1 month before enrollment. * Recent ankle surgery or acute ankle injury. * Receipt of other ankle-related treatment, rehabilitation, or additional training during the study period. * Diabetes, hyperlipidemia, or other conditions that may affect vascular status. * Neurological disease, major musculoskeletal disease, vestibular disorder, visual disorder, or other lower-limb conditions that could affect assessment. * Determined by the study physician or investigator to be unsuitable for participation.