Rob Kardashian Weight Gain 2014: 'KUWTK' Star Is Working With Gunnar Peterson Lose Weight

Rob Kardashian has completely dedicated himself to losing weight.

In a new interview, Kardashian's trainer, Gunnar Peterson, is speaking out, revealing just how motivated Kardashian is to drop some serious weight.

"Rob is such a solid guy, when he gets in here. I don't care if he weighs 50, 100 or 200 pounds. He works like an athlete," Gunnar revealed to E! News. "He never tries to beg out of a set. He never tries to hop off the cardio a minute or two before. He goes the distance every time."

Because of Kardashian's hectic schedule, there are times he is unable to get to the gym. As Peterson revealed, Kardashian is hard at work on his sock line, trying to make it a success, and is also involved in two shows, one being Keeping Up With The Kardashians and another being a new show he is shopping around to different networks.

Although Kardashian would certainly be at the gym every day if he could, his schedule simply doesn't allow it, which is why he goes the extra mile when he can get to the gym.

Despite his obstacles, Peterson is completely convinced that if Kardashian stays focused on his fitness, he'll have no problem getting back to the weight he was years ago.

"There's no doubt in my mind. With 26 years of training experience of doing this, I can tell you without hesitation that Rob Kardashian will get back to his best shape ever," Peterson stated. "There's not one doubt in my mind."