Certainly you've heard of 'the core." Yes? No? This refers to your abdominals and it's called core because without strong abs you will suffer in any sport you do. On the other hand, it you have strong abs, you will reach the stars.

I first heard of this concept in college. I ran cross-country and track, and our coach made us do a gruesome ab workout every day. Within 3 months I was running a 5:00/mile every mile in every 5 mile cross-country course. There was no turning back.

This workout gives you everything you need to develop strong, healthy, and by the way gorgeous abs. Latest research shows that defined abs attract more women than any other part of the body. (via bestabs.com)