Ali Vincent

First Female Winner of "The Biggest Loser"

Daniel Kraft, M.D.

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

Daphne Oz

Emmy Award-winning Television Host, New York Times Bestselling Author, Chef & Entrepreneur

Dara Torres

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

David Zinczenko

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

Deion Sanders

Head Football Coach at the University of Colorado Boulder; NFL Hall of Famer, Two-Time Super Bowl Champion, and Broadcast Analyst

Elevate and Dominate: 21 Ways to Win On and Off the Field

Dolvett Quince

Fitness Guru & Trainer from "The Biggest Loser"

Dr. Holly G. Atkinson

Award-Winning Medical Journalist

Dr. Travis Stork

Bestselling Author, Emergency Medicine Physician & TV Personality Known for "The Doctors"

Giuliana Rancic

Entertainment Journalist & Breast Cancer Survivor

Ian Morrison

Healthcare Futurist and Author

Jim Abbott

Former One-Handed Major League Baseball Pitcher

Joan Lunden

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

Joe Theismann

World Champion Quarterback, Broadcaster & Entrepreneur

Kyle Maynard

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

Lisa Leslie

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

Mark Ballas

Dancing with the Stars Champion & Mental Health Activist

Michael Strahan

Co-Host of "Good Morning America", "Fox NFL Sunday" Analyst, NFL Hall of Famer & Super Bowl Champion

Michael Strahan and his daughter Isabella, 19, reveal her brain cancer diagnosis in emo...

Olivia Ward

Winner of "Biggest Loser" Season 11

Ozzie Smith

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