A 12-week intervention of Sudarshan Kriya Yoga will be conducted, as per the details provided below. The SKY PTSD program is a mind-body resilience building program which has been specifically developed for persons with PTSD by the investigators collaborating not for profit organisation, Art of Living Foundation. The investigators wish to assess the feasibility of this intervention in the investigators routine trauma clinic at LHSC. The prescribed program of SKY includes specific breathing exercises, interactive discussions, journaling, yoga and guided meditations. It is supposed that the workshop builds a framework for resilience and empowerment, and develops self-awareness, connectedness and community, and a positive outlook. This minimally invasive treatment is not routinely performed as part of standard of care and is being applied in the study population for research purposes only. In addition to using feasibility measures, the investigators will use well-established clinical scales to assess symptoms of PSTD as well as comorbid depression, anxiety, quality of life as well as physiological measurements of the heart. These specifically include heart rate variability (HRV) and blood pressure measured at baseline (week 0), week 12 and week 24. Additionally, the investigators shall collect blood samples to measure possible changes in blood inflammatory markers at these three intervals of the study as described below.