But also — and almost just as importantly — the platform that I’ve been given to be able to reach out to so many other people that can’t get on the show but still do get inspired by watching, makes me just feel so much more excited about doing it every single season.” Harper said he knew early on that the show would be much more than a reality competition.

"I'm super excited about taking the position of host on ," Harper, 50, said in a press release about the news.

8, the veteran trainer is replacing Alison Sweeney as host of the weight-loss competition.

“People don’t realize they’re being tempted when they’re in their comfort zone because they feel at their best—or at least their most familiar,” says Harper.

“But changing your life, including losing weight, means getting very uncomfortable and shaking up long-held beliefs and habits.”Well-meaning friends and family can trip you up by drawing you back into familiar habits and patterns.

Now I've got to just approach my life in a different way."Harper recently spoke out at the premiere of the feature documentary, "The Resilient Heart." In the film, world-renowned physicians explore essential ways to decrease heart disease on a worldwide scale.

The physicians featured in the documentary educate adults on how basic lifestyle changes can help fight heart disease.

In February, Harper collapsed after a routine workout at a gym in New York City.

He says the incident dramatically changed his life."I think the biggest change for me is that I am learning to slow down and that's really hard for me," Harper recently told CBS News. It's like working out has really defined me and it's been who I have been for a very long time.

Half of us make them, and losing weight often tops our list of lofty goals.

But many of us are undone by everyday temptations that derail our best intentions to eat right, work out and take better care of ourselves.

"I've been with the show since Season 1, so I know all of the ins and outs, and let me tell you, the weigh-in room is going to be a completely different ballgame with me at the steering wheel." According to the release, Harper will still "offer his training expertise to contestants at various points throughout the season," but he'll also be guiding them "through all weigh-ins, challenges, and temptations." Returning stars Dolvett Quince and Jennifer Widerstrom will be the primary trainers.