Curious to know how celebrities squeeze fitness into their daily lives? Want to know the secrets of the stars? Bi-weekly our That's Fit fitness expert Fitz sits down with the celebs we want to know more about, and digs out their great and not-so-great methods to staying healthy.

This week I went back to talk with one of my favorite past guests, Mr. Colin Egglesfield. (To view Colin's in-depth interview click here.) Spring is here, summer is coming and this All My Children star has the most perfectly fit body one could wish for. We all want to know how celebrities earn their great bodies, and Colin was sweet enough to share his tips for preparing for swimsuit season. These tips are exactly as our favorite Calvin Klein underwear model gave them to me. So play close attention, follow his advice, and prepare to strut your stuff this summer!

• Run! You can do all the weight training in the world, but nothing burns off that winter weight better than a good 30-45 run at least three times a week. I like to start out doing about 30min and then gradually work up to an hour over the course of a few weeks as I start to get my stamina back. I love to run outside by myself with my headphones and some great music on my iPod and just go! It's my time to be alone with my thoughts, and anything that might be on my mind always seems to be a lot clearer after a good run.

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Okay, so you should grow old gracefully (it's just tacky to try to look 20 again), but to me gracefully means doing what you can to look as good as possible every step of the way. There's nothing wrong with putting up a little fight and giving those wrinkles a hard time of it.

There are many many things you can do to help slow the appearance and severity of natural aging, but according to this list by Clinique's dermatologist for iVillage, some of the first things on the list are to wear sunscreen diligently, wear sunglasses and avoid squinting, stop smoking (or don't ever start!), and eat a balanced nutritious diet. That's just the first 5 in a long list of tips, so see the article for 3 pages of just about everything else you can think of -- from getting enough sleep to exfoliating properly.

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