This is going to sound weird, but since I have been on finasteride and started working out again, I have seen some pretty good gains of muscle. I thought I would of seen the opposite. I started around 175 pounds, I have gained 10pounds and become quite abit leaner. To all those people who are worried about losing gains in the gym, I would not worry about it. I doubt finasteride has anything to do with it, it is probably my dedication and my diet.