You don't need a lot of equipment to get in a good workout around your midsection... your core. Dolvett Quince from "The Biggest Loser" shows Robin Meade how just getting down on all fours is a great start to a strong center.

Quince says if you have a stong core, you'll be able to improve the rest of your workout... lift more, run faster, run longer. So what is your core? It's your torso, your belly and all the way around your back muscles and lower back.

Here are a few moves you can do that require no special gear... all you need is a floor, and the will (watch the video in order to get the form right):

1) Get into a plank position... elbows on the floor, feet behind you up on your toes, back straight. Lean a little left and let your hip fall down to the ground... come back up to the plank position and do the same thing on the right.

2) Again, starting from that same plank position, elbows on the floor, bring your left knee up to you left elbow. Repeat on the right.

3) Now put your palms down on the floor and straighten your arms. As if you were getting ready to do some push ups. Feet still behind you and back still straight. Now push your butt up in the air till your body is in an arch... if you are familiar with yoga, you'll want to end up in the top position of the "downward facing dog" pose. Arch back down to the plank and repeat.

Try those out! Come back in a couple of days and let us know how you feel!