I'm trying to figure out what good testosterone is!!! Maybe I should trade mine for estrogen! I think it is very interesting what part genetics plays in muscle building potential. I know Cathe said that women may have a higher ratio of growth hormone than men, but I would love to have Stacy's problem. I have to work my "tocks" off to gain size! I did the body for life program in 2001 and I looked at my log and started off at 228 pounds, and at that point was trying to loose some fat and ,of course, gain muscle. I did sts last year and started off at 180 and added about 12 pounds of mostly muscle and made amazing strength gains but laid off several months and was down to 170!!!I probably added about 2" to my arms doing sts, but lost it all during the layoff. I have put about half of it back, but I have to go as heavy as possible to do it and it takes time. My dad was a big guy while playing college football but by the time he was my age he was about 170 pounds...genetics??? As an "honary lady" I'm jealous of you girls ripping the sleeves out of your shirts but curious as to why you wouldn't LOVE it!!!