Gym-goers tend to focus on surface-level muscles when training their core—but beneath the surface lies the deep core, an important group of muscles including the transverse abdominis, pelvic floor and diaphragm.
"The deep core muscles are the foundational muscles that provide stability, support and control for your spine, pelvis and entire torso," says Rebecca Stewart, CPT, PPSC, a strength coach and pain-free performance specialist.
