100. Ray Lewis

Over the course of 16 seasons in the NFL, the eventual hall-of-fame linebacker has set records for the most games started at inside linebacker, most seasons played at that position, and is the only player in history to record 40 career sacks and 30 career interceptions.

But it’s not just his play that makes Lewis noteworthy—his work ethic is unparalleled, and his durability in the world’s toughest sport is a credit to that. “I don’t train for reps and I don’t train for time,” Lewis told the NFL Network.

“I train for failure. I like to see my body fail. I know there’s nobody who’s working as hard as me.

99. Edwin Moses

When he was in training at Morehouse College, Edwin Moses’ teammates nicknamed him “The Bionic Man”—a nod to his punishing workout regimen.

They couldn’t knock the results: The two-time Olympic gold medalist went undefeated in 122 consecutive races—a stretch that lasted exactly 9 years, 9 months, and 9 days—during which he broke his own world record four times. One of the secrets to his success?

A bigger running stride allowed Moses to take just 13 steps between hurdles, while most other competitors required at least 14. Memorize the unwritten rules of the trail and track with these.