Melanie Whelan

Managing Director at Summit Partners; Former CEO of SoulCycle

Dara Torres

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

Scott Jurek

Ultramarathon Champion and Bestselling Author of "Eat & Run"

Ethan Zohn

Winner of "Survivor" Africa, 2x Cancer Survivor, Stem Cell Transplant Recipient, Social Entrepreneur, Philanthropist, Cancer Research Advocate, Former Pro Soccer Player, Sports Broadcaster & TV Personality

Shannon Miller

Olympic Gold Medalist, Health Advocate & Cancer Survivor

Nastia Liukin

Olympic Gold Medal Gymnast

Lisa Leslie

WNBA Champion, Olympic Gold Medalist & Author of "Don't Let the Lipstick Fool You;" Coach of Ice-Cube's BIG3 Basketball League

Dean Karnazes

The “Ultramarathon Man”, Ran 3,000 Miles Across the Country with Live! with Regis and Kelly’s “Run Across America” in 2011

Dominique Dawes

Three-time Olympian, Olympic Gold Medalist, Healthy Lifestyle Advocate and Gymnastics Academy Owner

Laila Ali

Undefeated Four-Time World Champion Boxer & Lifestyle Expert; Heart Disease Awareness Advocate

Erin Konheim Mandras

Inspirational Speaker & Blogger on Body Image

Dennis Kelly

Author, Peak Performance Master Trainer, Personal Growth Expert

Mark F. Twight

Alpine Mountaineer & Founder of Gym Jones

Dotsie Bausch

Olympic Silver Medalist, Motivational Speaker

Heath Calhoun

Alpine Skier & Veteran of the United States Army

Kory Puderbaugh

Paralympic Silver Medalist

Larysa Didio

Celebrity consultant in nutrition and healthful living.

Amy Purdy

Former "Dancing with the Stars" Contestant & Paralympic Professional Snowboarder

Akbar Gbajabiamila

Inspirational Former NFL Player & Broadcaster; Host of American Ninja Warrior & Co-Host of The Talk

Jeanette Jenkins

Founder & President of The Hollywood Trainer Fitness Company

Josh George

World's Best Wheelchair Athlete

Peter Vidmar

Olympic Gymnast, Fitness Advocate

Venus Williams

Professional Tennis Player, Four-Time Olympic Gold Medalist, Equal Pay Activist, Author & Entrepreneur

Serena Williams

Iconic Professional Tennis Player & Olympic Gold Medalist; Activist, Philanthropist & Entrepreneur

Herschel Walker

Former NFL Running Back, 1982 Heisman Trophy Winner & Mental Health Awareness Advocate

Mark Spitz

Legendary Olympic Swimmer; Third Athlete to Win Nine Olympic Gold Medals

Mark Spitz on the 1972 Olympic Games in Munich

Monica Seles

Retired World No. 1 Tennis Player & International Tennis Hall of Famer; Stabbing Survivor & Youngest-Ever French Open Winner

Vince Papale

Former NFL Player & Inspiration for the Movie "Invincible"

Martina Navratilova

Retired World #1 Tennis Player, International Tennis Hall of Famer, Gay Rights Activist & Author

Dan Marino

Pro Football Hall of Famer, Business Owner & Founder of the Dan Marino Foundation for Improving The Lives of Those on the Autism Spectrum