The less body fat you have, the higher the performance.
http://www.builtlean.com/2012/03/07/how-to-run-faster/
"For a 170 lb. athlete, a fat gain of 3.4 lbs. (2%), could result in a vertical jump height loss of 2”, and a 40 yard dash time increase of 0.26 seconds. If you are not familiar with the 40 yard dash, 0.26 seconds is an eternity. This is the same sprint test all NFL football players must do at the NFL Combine, which tests the athletic ability of all the athletes before entering the league. A 0.1 second difference can mean millions of dollars."
Sumo is an exception. It was traditionally short fat guys getting fatter to make it more difficult for the opponent. It is not really a sport dealing with performing better. As for the general sports like boxing, less fat means higher performance particularly in terms of footwork (which I consider the most important thing in boxing) I suppose.
http://www.builtlean.com/2012/03/07/how-to-run-faster/
"For a 170 lb. athlete, a fat gain of 3.4 lbs. (2%), could result in a vertical jump height loss of 2”, and a 40 yard dash time increase of 0.26 seconds. If you are not familiar with the 40 yard dash, 0.26 seconds is an eternity. This is the same sprint test all NFL football players must do at the NFL Combine, which tests the athletic ability of all the athletes before entering the league. A 0.1 second difference can mean millions of dollars."
Sumo is an exception. It was traditionally short fat guys getting fatter to make it more difficult for the opponent. It is not really a sport dealing with performing better. As for the general sports like boxing, less fat means higher performance particularly in terms of footwork (which I consider the most important thing in boxing) I suppose.
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