INTERVENTION PROGRAMS Yoga therapy: The yoga therapy consists of breathing control (10 minutes), body postures (40-45 minutes), and relaxation (5 minutes). The yoga therapy will be carried out three times per week for around 60 minutes at each session. The yoga class will be operated with a size of about 5-10 participants according to the general small-group size with one instructor in the commercial yoga studios in Hong Kong. The body postures used in the present study are designed to cover all body parts to give the body an overall strength and stretching.