Best Fitness Gurus

Explore top fitness thought leaders with Modern Mentors: Dive into a curated selection of authors and YouTube creators revolutionizing health and exercise. Join us to vote, discover, and learn from the best in fitness. We rank 75 fitness gurus by credibility; current leaders include Dr. Jason Fung, Aaron Horschig, Susan Peirce Thompson PhD.

Best fitness books, ranked →

Most popular fitness videos

Most popular YouTube videos from these mentors

10 Videos · View all

8-Step Longevity Workout w/ Mr1nf1n1ty

8-Step Longevity Workout w/ Mr1nf1n1ty

The Kneesovertoesguy
17,851,731
801,261
3 years ago
How to Reverse Type 2 Diabetes Naturally | Jason Fung

How to Reverse Type 2 Diabetes Naturally | Jason Fung

Jason Fung
6,419,762
91,259
13 years ago
Exercise For Longevity: Top 4 Things I’ve Learned

Exercise For Longevity: Top 4 Things I’ve Learned

The Kneesovertoesguy
5,132,984
197,627
2 years ago
He Released a PAINFUL Shoulder Knot!

He Released a PAINFUL Shoulder Knot!

Squat University
4,559,227
65,035
a month ago
How to (Potentially) Make Yourself a World-Class Athlete

How to (Potentially) Make Yourself a World-Class Athlete

The Kneesovertoesguy
4,319,309
177,768
6 years ago
7-Step ATG Mobility Routine (Plus 4-Step Shoulder Routine)

7-Step ATG Mobility Routine (Plus 4-Step Shoulder Routine)

The Kneesovertoesguy
3,210,446
73,299
4 years ago
How to Start Improving Bad Knees Right Now

How to Start Improving Bad Knees Right Now

The Kneesovertoesguy
2,998,199
65,643
4 years ago
His Neck & Upper Back Was SO STIFF Until...

His Neck & Upper Back Was SO STIFF Until...

Squat University
2,889,253
34,579
17 days ago
Fasting: Don't Make this Critical Mistake | Jason Fung

Fasting: Don't Make this Critical Mistake | Jason Fung

Jason Fung
2,790,422
83,082
5 years ago
Beginners Guide to Intermittent Fasting | Jason Fung

Beginners Guide to Intermittent Fasting | Jason Fung

Jason Fung
2,789,177
104,765
6 years ago
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Dr. Jason Fung

Dr. Jason Fung is a physician and author specializing in obesity and diabetes management through fasting.

YouTube
Aaron Horschig

Dr. Aaron Horschig is a renowned sports physical therapist, Olympic weightlifting coach, specialist in strength and conditioning, and author of the bestseller, ‘The Squat Bible.’ He is the founder of SquatUniversity.com, where he shares innovative methods for athlete performance enhancement and pain reduction. His clientele includes elite Olympic weightlifters and powerlifters, NFL and MLB athletes, as well as international level soccer players. He and his wife, Christine, reside in St. Louis.

YouTube
Susan Peirce Thompson PhD

Susan Peirce Thompson, Ph.D. is an expert in the psychology of eating and the founder of Bright Line Eating Solutions.

YouTube
Dr. Mike Israetel

Dr. Mike Israetel, the co-founder of Renaissance Periodization, holds a PhD in Sport Physiology. Formerly a professor of Exercise and Sport Science at Temple University, Israetel has consulted on sports nutrition for the U.S. Olympic Training Site and spoken at global conferences on health and performance, including ones at the U.S. Olympic Training Center in New York. He's originated from Moscow and has also coached many athletes and professionals in diet and weight training, alongside being a competitive bodybuilder and professional Brazilian Jiu Jitsu grappler himself.

YouTube
Ben Bergeron

Ben Bergeron, owner of CrossFit New England, has been coaching athletes since 1990 and elite CrossFit Games athletes since 2009. Focused on competitive excellence in training, he has coached five different CrossFit Games champions including top athletes Katrín Davíðsdóttir, Mat Fraser, Cole Sager, and Brooke Wells. A former competitor himself, he's also a family man devoted to his wife, Heather, and their children.

YouTube
Dr. Steven R Gundry

Dr. Steven Gundry is a renowned heart surgeon and medical innovator who's held positions at prestigious institutions including Yale University, the Medical College of Georgia, University of Michigan, and Loma Linda University Medical Center. Notable achievements include pioneering robotic surgery, devising heart-saving surgical instruments, and advancing pediatric heart transplantation. Gundry has also written and researched extensively on surgical, immunology, and dietary health. A significant career shift came after he designed and adopted a lectin-free, weight loss diet for himself, inspired by an "inoperable" patient's recovery through dietary changes. Today, Gundry leads the International Heart and Lung Institute and Center of Restorative Medicine, advocating for disease prevention and increased longevity through diet and supplements.

YouTube
Rosemary Gladstar

Rosemary Gladstar is a prominent American herbalist and educator known for her contributions to modern herbalism.

YouTube
Joel Fuhrman

Joel Fuhrman is an American doctor known for his plant-based diet advocacy.

YouTube
Bret Contreras

Bret Contreras is a leading expert in strength and conditioning, known for his contributions to glute training.

YouTube
William Davis

Dr. William Davis teaches about microbiome health and the impact of modern wheat on well-being.

YouTube
Ben Patrick

Ben Patrick — the "Knees Over Toes Guy" — is a fitness coach and founder of ATG (Athletic Truth Group), focused on pain-free, resilient knees and athleticism.

YouTube
Kelly Starrett

Kelly Starrett is a physical therapist and bestselling author known for his work in fitness and injury prevention.

YouTube