Table 2: Components of yoga intervention for each study.

Author (year) Postures (asana) Breathing exercises (pranayama) Concentration/meditation (dharana/dhyana) Deep relaxation/yoga sleep (nidra) Lecture/ counseling Anatomy Chanting Rakhshani et al. (2010) [31] × × × × ×     Satyapriya et al. (2009) [32] × × × × ×   × Sun et al. (2010) [28] ×   ×         Chuntharapat et al. (2008) [33] × × × ×   × × Narendran et al. (2005) [30] × × × ×       Narendran et al. (2005) [29] × × × ×