Discover How to Prevent Holiday Weight Gain. Killer Workout in Under 4 Minutes Rules: - Perform each exercise for 20 seconds in order - Rest 10 seconds in between exercises - Complete all 8 exercises - The entire workout only takes 3:50 to be exact

It's one of the greatest things you can experience and yet, do you know where it comes from or why we do it? Well, after this video, you still won't know, but you'll have a better idea and you'll probably smile too.