Julie Hadden, Season 4 of the Biggest Loser, weight lost: 97 lbs. (from 218 to 121 lbs.) Since losing almost 100 lbs. on the show, Hadden has undergone a lot of changes. Last December, she adopted a newborn son, Jaxon, and added late-night feedings and diaper changes to her workout regimen.

"I have new time challenges but my own health and fitness are priorities," says Hadden, who attends a women's fitness class three days a week for 90 minutes.

To relax, Hadden runs twice a week and insists the key is "never think you're done."

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