The fat-free body mass (FFM) for Japanese elite sumo (rikishi) wrestlers averages 109 kilograms, making these supersized competitors share the distinction of being among the world's largest athletes, similar to some American professional football players who weigh 227 kilograms.

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While Japanese elite sumo wrestlers (rikishi) are among the world's largest athletes, the comparison is not accurate as stated. The 109 kilograms refers to their fat-free body mass (FFM), not their total body weight. Sumo wrestlers can weigh much more in total, often exceeding 150 kilograms, due to their high body fat percentage. American professional football players weighing 227 kilograms (500 pounds) would be exceptionally rare, as this weight far exceeds the typical range for players, even those in the heaviest positions.

The Fat-Free Body Mass (FFM) for Japanese Elite Sumo (Rikishi)