The lumbar spine rests upon the sacrum. The place where they meet is called the lumbosacral joint, or L5-S1. The muscles in your lumbar spine work with your abdominal muscles to move your torso ...
At the L5/S1 level, 58% were found to have an element of disc displacement ... to investigate which particular training activities have the most impact on the lumbar spine, and how to modify training ...