Dara Torres

12x Olympic Medalist, NYT Bestselling Author, Entrepreneur & Healthcare Reform Advocate

Dolvett Quince

Fitness Guru & Trainer from "The Biggest Loser"

Tony Horton

Fitness Expert & Founder of Fitness Program P90X

Crush It!: The Revolutionary Fitness Plan for All Levels That Burns Fat, Builds Muscle,...

Giuliana Rancic

Entertainment Journalist & Breast Cancer Survivor

Joe Theismann

World Champion Quarterback, Broadcaster & Entrepreneur

Ozzie Smith

15-Time MLB All-Star & National Baseball Hall of Fame Inductee; Former Shortstop for the San Diego Padres & St. Louis Cardinals

Shannon Miller

Olympic Gold Medalist, Health Advocate & Cancer Survivor

Kyle Maynard

Inspirational Athlete, Author, Entrepreneur & Two-time ESPY Award Winner

Joan Lunden

Award-Winning Journalist, Best-Selling Author, Health & Wellness Advocate

Daniel Kraft, M.D.

Physician-Scientist; Founder of Exponential Medicine; Chair for Medicine & Neuroscience at Singularity University

Jim Abbott

Former One-Handed Major League Baseball Pitcher

Mark Ballas

Dancing with the Stars Champion & Mental Health Activist

Ian Morrison

Healthcare Futurist and Author

David Zinczenko

Founder & CEO of Galvanized; Former Vice President of Men's Health, Women's Health & Prevention; Retired Nutrition & Wellness Editor at ABC News

Rich Froning

CrossFit Athlete, Coach & Christian Speaker

Dr. Holly G. Atkinson

Award-Winning Medical Journalist

Tommy Caldwell & Kevin Jorgeson

Legendary Climbers of El Capitan

Ali Vincent

First Female Winner of "The Biggest Loser"