So the answer is that the fighters are losing "water weight" to make weigh-in, then they put back on weight, but it's mostly water.

It does sound unhealthy.

When I watch UFC fights, I usually watch the weight classes and say to myself, "Yep, that would be my weight if I was ripped and lean, but that is for my normal walk-around weight.

My normal weight now is about 177, and I'm lean and in decent shape.

If I was to get ripped and train, I'd probably fight at 165-170 or so, but that would be lean weight, NOT "depleted of water weight."

If I did that, I'd probably fight at 155.

Thanks dudes!

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What I was wondering was about "weight" before and during the fight.

A fighter has to workout, train and diet to make his weight, let's say 165 lbs.

Right after the weigh-in, do fighters then eat a lot of healthy food, but bulk up before the fight, thus adding 5-20 lbs., or whatever, and now he's up to 180 come fight time?
Clearly they do not get fat and out of shape in one day, but do they weight a lot more than the day before?

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