Forget weights — this 13-move ab workout builds a strong core in 15 minutes

Rather than spending hours in the gym, why not give this quick six-pack ab workout a go? Forget fussy dumbbell changes or even having to stand up, this at-home ab workout blasts your entire core in 13 moves and 15 minutes, with no equipment necessary.  

The Train With GAINSBYBRAINS (opens in new tab) six-pack workout gets its name because it primarily works your rectus abdominis — the abdominal muscles located at the front of your stomach responsible for the chiseled six-pack look. Sure, they look good, but your core muscles are also responsible for good posture and movement and keeping you injury-free.