Do this: Abdominal Pike

For those looking to tighten the abdominal area, cardio is Blair to your Serena.

You must trim excess fat off of the belly area in order for your ab muscles to show through. (That means you should not still be eating Thanksgiving leftovers!)

Friend #2, however, is an effective core exercise(s).

The abdominal pike, using an exercise ball, will engage your major core muscles, burning and tightening them with a simple, repetitive motion.

Start in a plank position (basic push-up) with your feet on top of an exercise ball. Engage your core, and pull (roll) the ball towards your chest, forming an inverted V with your entire body. Tighten your abs when you reach the highest point, and then slowly return to starting position.

Click on the title of this post for a video demonstration (with optional jack knife exercise).

Do you hear that? It's the sound of a thousand holiday calories screaming in pain.

It's summer in Rio, so prepare to suit up.