Regaining a Flexible Spine /A Feldenkrais Model. #20-301458 – 2 CEs for LMTs Movement requires an even give and take between opposing muscles, the agonists and antagonists. When one set of muscles stay tight, then fluid, easy movement disappears. Efficient functional movement of the spine requires even muscular tonus between flexor and extensor muscles of the torso and an […] Find out more »