Helen Phillips became "The Biggest Loser" on Tuesday night with a 140-pound weight loss -- 54.7 percent down from her 257 starting weight. Now she talks to ET about her biggest challenges.

"Being away from my family was difficult for me," the svelte, 117-pound winner tells ET. "There seemed to be a lot of game play on the ranch and you didn't know who to trust. That was difficult, because I am really not a game player. Having [trainer] Jillian [Michaels] to talk to about things was such a great help. She is an absolute genius in health and nutrition and then being able to discuss emotional things with her was just [a plus]. It was something that everybody needs."

When Helen left the ranch, she weighed 147 pounds, which means she lost an additional 30 pounds at home. She attributes her success to staying focused, and finding three trainers at her son's school to help her stay the course.

"I went back to the old-school type of training," she says. "I was doing crazy things like running up and down bleacher stairs. I would get up at 4:30 every morning and hit the gym two hours in the morning, two hours in the afternoon and two hours in the evening. In between, of course, I ate plenty of good food and got rest. It paid off."

Helen, of course, was awarded the $250,000 prize for her efforts. She plans to use a portion of the money to open a spin center in Detroit with daughter Shannon, but she also plans on celebrating first by taking her husband to Las Vegas.

"My husband is just an absolute doll," she says. "He has been my support system along with Jillian. He has held the home life together for eight months. My husband's sister passed away from brain cancer while I was on the ranch. I just want to give him a break. I want to take him to Las Vegas. I want to be floating in the pool with him and go for a walk slowly. I don't want to jog."

With a weight loss of 140 pounds, Helen admits to having a lot of lose skin, so the next step for her is to work on toning her muscles and building muscle strength, even though she knows that will put on a few pounds.

"That is fine with me because it is all muscle. There is no body fat. It will all be lean muscle," she says.

As for the possibility of plastic surgery to remove the skin, she says there is only one surgery she will consider.

"I discussed that with Dr. H because my chest area was so big before," she admits. "But he tells me, I need to work on toning. I would consider chest surgery. I don't think you can tone that area."