In a field experiment with 72 participants, we study the impact of Sudarshan Kriya on participants’ physiological and psychological variables. The intervention significantly reduced participants’ stress levels and blood cortisol levels and increased their life satisfaction, emotional intelligence and emotional stability. The results of the field experiment were triangulated with an open-ended survey of participants, and we found that the effects of the programme were sustainable after a year, especially for those who continued to practise the technique learned in the programme.