7 Healthcast: The Biggest Loser

He may not have been "The Biggest Loser" on NBC's hit show, but Mark Kruger of Dartmouth says losing 129 pounds makes him a winner!

"I just can't believe the physical condition I'm in and the clothes that I fit into now it's just insane, " Mark said.

And Mark plans to keep it that way.

"There is no way that I'll let it go or go back to the way I was. I worked way too hard, I went through way too much to go back, " said Mark.

He's back at his full-time job, but still makes time to run six miles every morning. He says even though there are more temptations now, he's sticking to a healthy diet.

"There are more choices here than there were on the ranch, so I have to be really cognisant of what I pick and what I eat and make sure that everything still meets my calorie requirements for the day, " Mark said.

When it comes to eating healthy, Mark says it's simpler than you might think.

"It really is as simple as calories in versus calories out. Just make sure that you burn more calories a day than you eat, and you're guaranteed to lose weight," advised Mark.

When you're burning those calories, Mark says going the extra mile can make all the difference.

"When you get to the point when you're exercising that you think you've had enough or you're tired, push yourself another five minutes, push yourself another ten minutes because in that zone of discomfort is where you're going to see the most change to your body, " Mark said.

He's also learned that the first step toward getting in shape is always the toughest, so he says if you're looking to lose weight, just start the process and it'll get easier as you go. 

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