Dolvett Quince, Jillian Michaels and Bob Harper from “The Biggest Loser”

As years come and go, countless men and women create their own new year's resolution, whether it's kicking a bad habit or saving more money.

A popular resolution theme is losing weight, by eating healthier or exercising more often. While hundreds try to keep with their resolution, it seems NBC has a resolution of its own.

"The Biggest Loser" returns for the 14th season in a special two-night premiere airing Sunday, Jan. 6, and producers have set out to surprise viewers. Not only is Jillian Michaels making her return to the show for the first time since May 2011, but the hit show is taking on one of America's biggest problems -- childhood obesity.

For the very first time, young adults ages 13 to 17 will join the adult contestants at the ranch and play from home. Up until now, contestants have only been picked if they are 18 years old or older. This new twist to the series has probably been a change in the making, since last season the makeover episode took place in Washington, D.C., with the appearance of first lady Michelle Obama. A big fan of the show, the first lady talked to the remaining competitors about her initiative against childhood obesity called "Let's Move," bringing families together to exercise as one. More than 12.5 million children and adolescents around the world are obese, taking the level to an all-time high. NBC hopes to educate and help these young adults -- and viewers at home -- by helping them see the changes that can come from switching to a healthier lifestyle.

Michaels, joined by Bob Harper and Dolvett Quince, will coach the new hopefuls and their younger teammates to victory and a healthy lifestyle. The red, black and blue teams will each have at least one child contestant who will compete in challenges and contribute to the team, but they will not be eligible for elimination. The child contestants will work both at home and at the ranch, with their personal progress shown in every episode. The trainers, "The Biggest Loser" medical staff and behind-the-scenes childhood obesity experts will help the younger contestants in staying healthy and transforming their lives.

Michaels, one of the most famous trainers from the show, will be returning to coach the black team at the ranch for the first time since her planned departure a couple of years ago. The trainer was with the show during the first two seasons and then returned for seasons 4 through 11, as well as training contestants on the Australian version of the show from 2006 to 2008. Michaels was last seen in the spring of 2011 before she went off to start her own show on NBC called "Losing It With Jillian," in which Michaels would spend one week with a family and work one-on-one with each family member. The show was unfortunately canceled after eight episodes. Besides "The Biggest Loser," Michaels is a regular on "The Doctors" and has been seen on "Dr. Phil."

“The Biggest Loser” host Alison Sweeney

Michaels has more than 15 workout DVDs, several published books, including two on the New York Times best seller list, and four video games for Wii and Xbox 360. From 2006 to 2009, Michaels hosted a Sunday talk radio show, but since February 2011 she has produced her own weekly podcast on iTunes called "The Jillian Michaels Show," and that same year she won the Best New Audio Podcast award during the App Store Rewind. In December 2010, Michaels announced over Twitter that Season 11 would be her last, but now she's back and with a whole new attitude.

"As a former overweight teen, I know firsthand how dramatically weight issues can affect every aspect of a child's life," Michaels told NBC. "Having recently become a mother of two, I am more passionate than ever about helping empower children and families with the information and resources they need to live a healthier life."

"The Biggest Loser" also brings together the contestants with the emotionally and physically trying weeks. In fact, in the 13 seasons of "The Biggest Loser," more contestants have met, fallen in love and gotten married than all 26 seasons of "The Bachelor" and "The Bachelorette" combined. With only three actual weddings so far, ABC's "The Bachelor" and its gender-swapping spinoff can't compare to the seven couples brought together in this weight-loss show. "The Biggest Loser" has three couples that are married with another three that are engaged and a handful that are dating -- it just goes to show you that while the "reality" in reality TV can sometimes be a stretch, these contestants truly do work together and form close bonds with each other.

Join the trainers and new contestants when they head back to "The Biggest Loser" ranch in California for the 14th season of the ups and downs of weight loss. Catch all of the action as Jillian makes her grand return and the teenage contestants make their appearance on Sunday, Jan. 6.

"The Biggest Loser" is a Shine America, 25/7 Productions and 3 Ball Productions show. Executive producers of the show are Dave Broome, Eden Gaha, Paul Franklin, Todd Lubin, Lisa Hennessy, Ben Silverman, JD Roth and Todd A. Nelson.