Do you want to get fit? CNN's Dr. Sanjay Gupta is looking for five people living in the U.S. who are ready to change their lives.
Send a video submission telling us why you're an ideal candidate for the Fit Nation Triathlon Challenge -- a 6-month journey that ends at the Nautica New York City Triathlon on July 18, 2010. The Olympic Distance race consists of a 1500m swim, a 40k bike ride, and a 10k run.
Keep your videos short, no longer than three minutes. The deadline for submissions is December 14.
Update: Meet the lucky six contestants!

