the other day i was watching the ultimate fight 1,there was an episode where bobby southworth was asked to cut 20lbs from 225lbs to 205..he cut his weight by being in the sauna for hrs and this was just 2 days before the fight and he cut his weight by 20lbs..how is that possible?chuck liddel said that cutting weight is getting rid of the water weight and loosing weight is a different thing?..plz explain me this