Fig. 2

Sitting isometric yoga program. The 20-min sitting isometric yoga program consisted of three parts. (1) Patients practiced being aware of their spontaneous breathing for 1 min to facilitate interoceptive and proprioceptive awareness. (2) Patients slowly practiced six isometric postures, taking 3–10 s each (5 s in average), in association with exhalation with/without sounds, using 50% maximal physical strength. (3) Patients practiced abdominal breathing for 1 min