Sciatica is one of the most common causes of persistent lower body pain in active adults, and radiating arm pain from cervical nerve compression is its upper body equivalent. Both conditions share a mechanism: the peripheral nerve is irritated, compressed, or has lost its normal ability to glide freely through the surrounding tissues. Movement that…

Most people who train the core train the visible core: crunches for the rectus abdominis, planks for surface endurance, side bends for the obliques. These exercises develop the muscles that are visible and the movements that feel like core work. They largely bypass the transversus abdominis, the deepest abdominal muscle, which is invisible, produces no…