Jackie WarnerToned trainer Jackie Warner, star of Bravo's new weight-loss show 'Thintervention,' is finally opening up about her weight issues. The 42-year-old trainer reveals she ballooned from 118 pounds to 169 pounds while in college.

"I was alone in LA, and it was a huge culture shock," Warner, an Ohio native, tells InTouch Weekly. "I was depressed and ate junk food every day."

Warner packed on the pounds and struggled to get back to her thin frame. "I was miserable and felt so out of control. I tried covering up with baggy clothes, but I was insecure from the time I woke up until I went to sleep."

After months of emotional eating, the former 'Work Out' trainer knew it was time to get serious about her health. "It took four months. I was ambitious, and knew I wouldn't get anywhere carrying all that insecurity. So I started walking to school every morning, exercising and eating healthy," Warner recalls.