Ruben Studdard has lost 112 pounds during the past few months, but says he would never get weight-loss surgery because he wants to slim down naturally, through diet and exercise.
"I was raised to believe that I can do all things through Christ who strengthens me," Studdard told Wendy Williams.
Studies show weight-loss surgery overwhelmingly beats diet and exercise for producing dramatic and rapid weight loss. But it's not without risks, and patients often regain some of the lost weight.
In 2012, comedian Lisa Lampanelli lost 106 pounds after undergoing gastric-sleeve surgery. Similarly, New Jersey Gov. Chris Christie has lost over 70 pounds since getting lap-band in February 2013. Both said they tried countless diets before resorting to bariatric surgery, which they called life-changing.
The 6-foot-3 Ruben, who once tipped the scales at 462 pounds, now weighs a healthier 350 pounds. The former "Biggest Loser" contestant credits a low-calorie diet and grueling six-day-a-week workouts for his amazing weight loss.
"I count calories," said Studdard, 35. "One thing I have to make myself do every morning is get my big butt to the gym."
Ruben's workouts these days last 90 to 120 minutes, and combine cardio exercise on the treadmill with weight-lifting. When he was competing on the "Biggest Loser," Studdard worked out up to eight hours a day.
The "American Idol" winner said he has a goal weight in mind, but doesn't want to reveal the number yet. Studdard hopes to reach his target weight by his 36th birthday (in September 2014).
Ruben is proud of his transformation, and told Wendy Williams he recently ran a 5K race. He credited his rigorous workouts on the "Biggest Loser" for giving him the stamina to complete the race.
Sadly, Studdard was diagnosed with type 2 diabetes while competing on "The Biggest Loser." He was shocked by the diagnosis, but it makes him even more motivated to continue with his weight loss.
Ruben said weighing himself can sometimes be discouraging because the scale doesn't always reflect the tremendous effort he puts in, but he's proud of every pound he loses.
"Sometimes the scale just doesn't show the hard work that you put in," he said. "You just never know what the scale is going to say [but] I celebrate every pound I lose."
Studdard's new album, Unconditional Love, is out now.