You're Going to Want to Pin This. If you did this everyday for a week, you'd burn calories. That's nearly 2 pounds. Not including all of the extra calories you burn during the day. Come on, 1 hr out of your What excuse do you have not to!?
Do this static stretching routine at the end of your core workout. Ab, oblique and lower back stretches to increase your flexibility and release all tension. http://www.spotebi.com/workout-routines/core-static-stretching-exercises/