system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference in training that results in sumos being big, fat and strong, and wrestlers big, lean and strong?

Both are very strong, do intense training and eat enormous amounts of calories to supplement. Yet why do sumos become fat and immensely strong, and wrestlers become more muscular and lean?
gpt
Sumos have different classes, as do western wrestlers. However, a sumo’s size isn’t necessarily his only advantage. He needs skills, as do western wrestlers. Here’s where the difference is. Sumo wrestling takes place entirely on their feet. Once they fall, the match is done. Western wrestlers continue on the ground, where body fat would simply get in the way and tire them out.