You can see that most track and field athletes have low body fat, except for the shot put.

There are not many other contacts, and professional marathoners still need to deliberately control their weight and lose fat before the game. Carrying a few kilograms of fat on your body will greatly affect your sports performance. Even the muscles are the most cost-effective core, hips and legs. They will not be heavy in other places, and their muscles in other places will not improve their sports performance. If they grow longer, they will be heavy.