I've always been thin. I'm 6ft and weight about 158lbs on a good day. I've been working out 2 or 3 times a week lately, just at home, a fast paced P90x style workout. It's helping me tone up...but not bulk up I think that's a matter of calorie intake.
G, I think you're still within your ideal weight range:
Me: 35|WAW: 38|D: 6yo | http://tinyurl.com/2dxx7m6 Feb 2006, left, came back in two weeks Aug 2006, left again Apr 2007, filed for divorce Dec 2007, reunited Mar 2010, moved out, filed again