The Core as a Cylinder, Not a Six-Pack
Introduce the four-wall cylinder model — diaphragm, pelvic floor, transverse abdominis, and multifidus — and why it outperforms the rectus abdominis myth.
Introduce the four-wall cylinder model — diaphragm, pelvic floor, transverse abdominis, and multifidus — and why it outperforms the rectus abdominis myth.