Originally Posted by
Macker
A dog weighs in the same day as a show, it's completely different to martial arts.
In Thai boxing, mma and boxing you weigh in 24 hours before a fight, the idea of drying yourself out and sweat training is so you usually fight at a lighter natural weight because you have 24 hours to rehydrate, if your doing your cut through diet and not cutting water then the thing you face is the strong possibility of fighting a bigger man. I'm Thai boxing and mma this wasn't a huge deal as guys didn't really know much about cutting weight but in later years the mma guys have really caught on which is why you have huge guys at the weight. In boxing you just wouldn't have ever got away with it because the professional edge of the sport had the athletes way more advanced.
The reason you way in 24 hours in advance is for fighter safety around dehydration.