Simplified Tai Chi Exercises to Improve Function in People with Chronic Ankle Instability

The goal of this interventional trial is to evaluate the effectiveness of the simplified four-week Tai Chi training in improving function in people with chronic ankle instability. The main questions it aims to answer are: 1. Does the 4-week Tai Chi training increase ankle muscle activation? 2. Does the 4-week Tai Chi training enhance ankle proprioception? 3. Does the 4-week Tai Chi training improve ankle muscle strength？ 4. Does the 4-week Tai Chi training boost balance performance？ 5. Does the 4-week Tai Chi training enhance subjective ankle stability and quality of life? Researchers will compare Tai Chi training to self-management to see if this Tai Chi training works to enhance ankle stability performance. Participants will: 1. Take self-management and Tai Chi training, and each for 4 weeks 2. Visit the labs every 4 weeks for biomechanical measurements and questionnaires, totally 3 times.