Stacy Mantooth was an avid fan of the sport of triathlon before joining CNN 's Fit Nation . She is now a fitness instructor and has been featured on CNN's The Biggest Loser, Dr. Oz, Good Morning America, Today Show with Kathie Lee Gifford and more. Mantooth is sharing his knowledge with family and friends who are training with him .
Stacy Mantooth was an avid fan of the sport of triathlon before joining CNN 's Fit Nation . He 's training for his first triathlon and has learned a lot about the do 's and don'ts . Mantooth is sharing his knowledge with family and friends who are training with him .