Devin Alexander

New York Times Bestselling Author, Celebrity Chef Known For "Biggest Loser"

Alice Waters

Executive Chef, Founder & Owner of Chez Panisse; Sustainable Agriculture Advocate

Peter Salgo

Healthcare Futurist, Emmy Award-Winning Health & Science Correspondent, Author of "The Heart of the Matter"

Jen Selter

Fitness Personality & Instagram Celebrity

David Cutler

Harvard Professor of Applied Economics & Author

Dr. Ian Smith

Doctor, New York Times Bestselling Author, Medical Contributor & Host of "The Doctors"

Dr. Ian Smith Has a 'Fast Burn' Plan for Weight Loss | NBC10

Afterburner

US Fighter Pilots & Team-Building Experts

Michael Treacy

Best-Selling Author, Entrepreneur & Business Adviser

Nastia Liukin

Olympic Gold Medal Gymnast

Chris Powell

Trainer and Transformation Specialist on ABC's "Extreme Makeover: Weight Loss Edition"

Richard Simmons

Fitness Instructor, Actor, Video Producer Known for "Sweatin' to the Oldies" Aerobics Videos

Ellie Krieger

Chef, Nutritionist, Best-Selling Author & Host of “Ellie’s Real Good Food”

Matthew Kelly

Best-Selling Author & Motivational Coach

Aly Raisman

Olympic Gymnast, Gold Medalist, Captain of the "Fierce Five" & the "Final Five"

Ken Dychtwald

Founder & CEO of Age Wave; Gerontologist & Expert on Aging-Related Issues

Diana Nyad

World Champion Swimmer, Storyteller, Sports Journalist & Broadcaster

Jillian Michaels

Leading Fitness Expert, Certified Nutritionist, Renowned Life Coach & Powerful Entrepreneur