Tonight, First Lady Michelle Obama issued a challenge to contestants on the Biggest Loser – and they need your help.

Throughout the season, contestants have worked hard to make lifestyle changes to improve their health and enhance their lives. Continuing these changes beyond the show and inspiring others to embark on the same live-saving journey is the next challenge for the remaining six contestants.

Last week after the makeovers, Buddy, Christine, Conda, Jeremy, Kim and Mark were at the White House for some hearfelt reunions. This week the First Lady joined the cast for a workout in the East Room and then made her proposition: Whichever contestant can encourage the most people to sign up for the Presidential Active Lifestyle Award (PALA+) – a challenge designed to help you commit to regular physical activity and healthy eating – will win a brand new $30,000 gym for a school or community group in his/her hometown.

First Lady Michelle Obama hosts six contestants – and their families – from Season 13 of NBC's the Biggest Loser, in the East Room of the White House for a White House-Biggest Loser first-ever workout session. 

Do your part to help get America moving!

Register for a PALA+ team and follow the competition here.

Learn more about the PALA+ challenge and what you can do to win your own award.