By Marc Heller, DC Learn Back Pain Exercises to Relieve Low Back Pain The very first time a yoga teacher told to me to lean forward against a wall to do a modified down dog (wall dog), I was petrified. My lower back, my discs, do not like sustained flexion. The yoga teacher showed me that the goal was to lengthen the spine and keep it in neutral. Once I got over my fear, the modified down dog became a mainstay of my disc exercise routines. I am reminded of this because foundation training uses a "braced spine" position as a way to strengthen and tone the back extensors, in concert with activating the wholeposterior chain. Eric Goodman, the chiropractor / trainer who developed