I have been dioagnosed with having minor spondylitis in the lower thoracic/lumbar region by 2 osteopaths. I was a gymnast as a child, and I have been practicing Ashtanga yoga for 5 years and have never had any real problems with backbends/inversions - Dhanurasana/ Urdhva Dhanurasana etc. I do practice drop-backs unassisted, and my teacher has recently been assisting me in chakra bandhasana which I find extremly difficult.
Inversions/Dhanurasanas don’t cause me any pain or discomfort, and I thoroughly enjoy my practice, however, I notice the occasional tenderness in my back which may vary day to day that sometimes between the middle of the back to the lower back.
My concern is that I am doing more harm than good for my spine, and as the years progress, as well as my practice, I am/will be practicing postures that will hinder the future health of my back. I don’t want to give up my practice, but I don’t want to surrender the health of my spine also.
What are your thoughts?