You actually see this in mixed martial arts as well where Japanese fighters often refuse to cut weight and instead fight at their natural weight. For those who

You actually see this in mixed martial arts as well where Japanese fighters often refuse to cut weight and instead fight at their natural weight. For those who are unaware in MMA everything is done by weight classes. If you fight at 155, you need to stand on a scale and weigh 155 or less the day before the fight. Most fighters tend to start at a much higher wight and cut all the water out of their system in the days before. Once they officially weigh in, they rehydrate which makes them much heavier by fight day. A lot of fighters cut more than 20 pounds leading up to a fight, so you can imagine what a disadvantage a fighter is at who fights at their natural weight.