Add a little extra to your bicycle crunches. Try to make the lift and the recline as smooth as possible. It works the entire core at once. Do 3 sets of 10. Its killer. Share this with your friends or on your timeline for later as a reminder! Comment below when you try it and let me know what you think and how you did.
For me it was Core Kinetics and a 2 mile run for the win today.