Control group
Patients assigned to the control group received traditional in-hospital CR training combined with the traditional Chinese exercise Ba Duan Jin. The specific rehabilitation training was as follows: respiratory training for 10 min; aerobic exercise for 15 min; resistance exercise comprising simple dumbbell exercises for 10 min; Ba Duan Jin exercises for 10 min (see the appendix for the specific movements in the Ba Duan Jin, repeat each of the 8 segments three times); and balance and flexibility exercise relaxation training for 10 min. Patients were encouraged to visit the hospital three times a week for 50–60 min of exercise each visit. The age-predicted target heart rate (220 minus the patient’s age in years) was used as a measure of intensity regarding the aerobic portion of the exercise training regimen