Danny Cahill

Season 8 of The Biggest Loser was all about second chances, especially for newly crowned winner Danny Cahill. The 40-year-old from Broken Arrow, Okla., was an overweight teen who managed to lose the weight and pursue his dream of becoming a successful musician. After falling off the wagon and gaining the weight back, though, Danny became determined to shed the weight once and for all. By the season finale, he lost 55 percent of his body mass, ending up at 191 pounds.

Read our Biggest Loser finale episode recap

So how did Danny stick with his weight loss routine off the ranch and claim the title? "I was a stickler with what I put in my body," Danny told TVGuide.com. "I kept the workouts the same as I did on the ranch; I did that with the help of my family because they supported me wholeheartedly in the process."

The land surveyor and father of two beat fellow finalists Rudy Pauls, 31, who lost 52.94 percent to get down to 208 pounds, and 19-year-old Amanda Arlauskas, who lost 34.8 percent of her body weight and currently weighs 163 pounds. 

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Cahill says the program's toughest challenge was the marathon. "Running was definitely not my strong point. I was still 288 pounds and to know that in just 60 days I was going to have to run a marathon, that was a scary thing," he says. "The way to conquer your fears is to just go out and do them. It felt great going across that finish line with Liz — something we never thought we would do before."

The Biggest Loser Season 9 premieres Tuesday, Jan. 5 at 8/7c on NBC.