2.3. Experimental Procedure
This experimental study was a randomized controlled trial. The project manager used web programming at Randomizer.org to randomly divide the participants into three groups: the BW-TC group, the TH-TC group and the control group (CG). The BW-TC and TH-TC groups both received Tai Chi training three times a week for 12 weeks, with each class lasting 60 min and including 15 min of warm-up exercises, 30 min of Tai Chi and 15 min of cool-down exercises; static stretching was used as a warm-up and cool-down component before and after the intervention [The training sessions were scheduled during the students’ daily activity time on Mondays, Wednesdays and Fridays from 5:30 p.m. to 6:30 p.m. All assessments were conducted on Saturdays and Sundays with 30 participants in each group, and the exercise programs were performed under the direction of the researchers or trained research assistants. Prior to the intervention, all subjects underwent a baseline test that included an evaluation of basic personal physical attributes such as gender, age, height, weight and BMI; body composition and blood lipid measurements were also evaluated. After 12 weeks of Tai Chi training, all 81 subjects were reassessed using the same variables as before the intervention.