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LeBron James

Athletes are known to be on really high-carb diets, but what would happen if they changed the game around and went on a high-fat, low-carb kick? Determined to bring a championship to Cleveland, LeBron needed to perform at his peak.

He dedicated himself to a 67-day Paleo and ketogenic diet focused around meat, fish, lots of vegetables, and low-sugar fruits occasionally, according to Sports Illustrated. To LeBron, the ketogenic diet was a test of his mental fortitude and willpower. He wanted to prove to himself that he can get the results he wants to see.

Image Source: Getty / Mike Lawrie