Try this ball crunch

This is a very effective exercise for both men and women to do, in the comfort of home, or at the gym.

Here are the steps:

Step 1: Lay down flat on your mat with your arms extended above your head, and put your workout ball between your ankles.

Step 2: With the ball between your ankles, crunch your body up with both your arms, and ankles meeting in the middle. At this point, you will be taking the ball from your ankles into your hands, and laying back down to your starting position.

Step 3: Repeat this motion from hands to ankles, ankles to hands with 3 sets. Start with a number that you feel comfortable with, and add more to each set later. Believe me these will burn tomorrow!

Enjoy!