I 33 yrs old and stand at 5'9". My weight as of now is 150. I could never get past 145 until I tried HST. My bodyfat has increased somewhat since I've gotten older....esp. around the stomach area....but I am pretty much still a slim guy with that "swimmer's build". I guess you could say I have a toned build. I've always been proud of my body shape although I've always wanted to gain a lot more muscle. My frame is kind of narrow with a nice taper from the top of my torso to my waist. When I discovered HST I was introduced to stiff-legged deadlifts as an alternative to leg curls to build the hamstrings and I jumped on it. I don't think I did it right and I think I probably built up my hip flexors more than anything else. I've read this builds up the obliques to be out of balance with the rest of the boby as well....and that's what I've obviously done. My question is....how can you reduce this muscle mass? My waist doesn't taper anymore and I don't like the look at all.