Doing crunch after crunch in the hopes of a flat stomach can get boring, quickly.
Just a few minutes of each of these variations of the standard ab crunch will work new muscles so you get tight abs, and a strong core. It will also improve your posture and overall running.
If you want to take your ab and core training up a notch, take on our 30 day ab challenge and 30 day core challenge:
Just a few minutes of each of these variations of the standard ab crunch will work new muscles so you get tight abs, and a strong core. It will also improve your posture and overall running.
If you want to take your ab and core training up a notch, take on our 30 day ab challenge and 30 day core challenge:
More Fitness On :5 Best Crunches to Work Your Core
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