Contrary to popular belief, abs and core are not the same. And it's essential to get that if you want — and we know you do — that six-pack.
Ab Crack: What Is It and Is It OK to Have One?
What's the Difference between Core and Abs? (AND How to Train Them
Abs vs Core Training: what's the difference? — Functional Flow Pilates
Why the Transverse Abdominus is an Important Part of Your Core
10 Best Ab Workout Exercises for Building Muscle
Core strength ≠ Visible toned abs
The difference between abs and core
Abdominal Muscles - Physiopedia
The Secret to Flat Abs - Core Exercise Solutions
Abs' versus 'Core' – What's the difference? - Fitness Enhancement