It's well established that a strong core can help with posture and back issues, and properly executed sit ups can contribute to a stronger, more stable core. "Regularly doing sit-ups or crunches can ...

Finally, far from focusing on a flat stomach, your deep core muscles work your pelvic floor and diaphragm. Your pelvic floor muscles are a group of muscles at the base of your pelvis, and ...

So, in the name of curiosity (and core strength), I decided to try a workout created by Justin Gelband — a world-class ...