Systematic reviews indicate that yoga offers moderate benefit in the treatment of PTSD. A 2017 systematic review of PTSD in post-9/11 veterans showed that participants in studies who had received mindfulness training, mind-body therapy, and yoga "reported significant improvements in PTSD symptoms". Another systematic review on veterans the same year also found improvement in PTSD symptoms. Other systematic reviews postulate that designing the style and instructions to the needs of the veterans leads to better results and a larger impact on PTSD symptoms.