64: The Hardest Human Alive, Ultra Runner

Navy SEAL and endurance athlete, David Goggins, joins the Finding Mastery podcast to share his quest to become the hardest human alive.

Running: How to teach kids to sprint correctly – Active For Life

The 100 Hardest Video Game Bosses, Ranked By Difficulty

Dean Karnazes: The Man Who Can Run Forever

10 Best Trail Running Shoes

Inside the Pain Cave With Ultrarunning GOAT Courtney Dauwalter - The Ringer

World's Toughest Races: These Are the Hardest Races in the World

76-year-old prepared to run the world's toughest ultramarathon

David Goggins: How To Become The Toughest Man Alive

Highlights From the 2023 New York City Marathon - The New York Times

Ultra runs: The world's longest, hardest & toughest

World's Toughest Races: These Are the Hardest Races in the World

The Badwater Ultra Challenges Top Endurance Athletes – ATLX

World's Toughest Races: These Are the Hardest Races in the World

Man running length of Africa shares incredible 7 year transformation, UK News

The Marathon des Sables is the world's toughest race. This man veered 291km off course — and survived - ABC News