[3] However, a 2019 systematic review found that the studies to date were not sufficiently robustly designed to provide strong evidence of yoga's effectiveness as a therapy; it called for further research.[5][6] Trauma can trigger a chronic stress response in the body,[7][8] which may manifest as an uncontrollable and constant state of heightened arousal and fear.[5][6][10][11] Traumatized individuals often have difficulty soothing their overactive internal sensations without relying on external stimuli, such as food, substances, or self-harm.[4][14] Though most evidence-based treatments focus on the psychological effects of trauma first and foremost,[4][5] attrition rates are still high, possibly due to heightened physiological arousal during the initial stages of exposure therapy.[4][15] Mind-body approaches offer a complementary method to traditional psychotherapy, allowing traumatized individuals to reconnect with and identify their own physical sensations.[3] Throughout, participants are encouraged to make choices for themselves about what feels comfortable and safe in their bodies, and instructors spaciously invite students to modify any posture as needed.[3] Therefore, instructors strive throughout to create an environment that feels both physically and emotionally safe for the participants, thereby facilitating a healing atmosphere for traumatised individuals.
Postural yoga teachers may respectfully adjust a pupil's body hands-on, whereas trauma-sensitive yoga requires giving space to participants.