I have been powerlifting since 1999 and competed in the 132 pound weight class until two years ago, when the I.P.F. increased the class to 138 pounds. I have to keep a fairly clean diet in order to keep my weight close to 132 pounds. I normally walk around at a lean 135 pounds and then have to diet hard and sauna to make the 132 weight class. In order to maintain my strength in this weight class, I found it important to train close to that weight. You can find examples of athletes that drop 10-15 pounds the week before a competition then sauna and compete in a very dehydrated state. However, not many of them can maintain the strength they had in their training cycle for the meet.