What great insights into the use of classes, follow up, Yoga, journaling and daily exercise for a year for the treatment of low back pain. They had a weekly class for 12 weeks with a form to fill out and were expected to do a half hour of practice every day. This is a lifestyle metamorphosis for most people and is awesome. The exercise progressed in a logical manner. I would be a bit cautious of doing twisting poses early on but they advised to not do anything painful, which is great. The online teachers guide is a great resource for professional and attendees with back pain. Great job https://static-content.springer.com/esm/art%3A10.1186%2F1745-6215-15-67/MediaObjects/13063_2013_1959_MOESM2_ESM.pdf Here is the original article also http://annals.org/aim/article/2633223/yoga-physical-therapy-education-chronic-low-back-pain