BACKGROUND: An ankle sprain is a common joint sprain in sports injury, which is closely related to its physiological position and anatomical characteristics, and may progress into chronic ankle instability after improper early treatment or premature exercise. OBJECTIVE: To analyze the tertiary rehabilitation effect of acute lateral ankle sprain caused by sports training. METHOD: Ninety-six athletes with acute lateral ankle sprain diagnosed from January 2019 to June 2020 were included and divided into the control group and the rehabilitation group using the random number table grouping method, with 48 cases in each group. The two groups received standardized treatment, and the rehabilitation group additionally received tertiary rehabilitation. The American Orthopedic Foot and Ankle Society (AOFAS) scores, degree of ankle swelling, pain, and re-injury rate were compared between the two groups. RESULTS: The AOFAS scores of the two groups increased after treatment (p < 0.05). The degree of swelling in both groups after treatment was improved (p < 0.05). The visual analogue scale (VAS) scores in both groups declined two weeks after treatment, with lower results observed in the rehabilitation group The two groups showed similar results of the follow-up visit (p < 0.05). CONCLUSION: Rehabilitation exercise on acute lateral ankle sprain effectively relieves ankle swelling and pain.

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