Right. Anyway, I've been lifting on and off for years, but my muscle mass has remained unchanged for years as well. I have 16" arms and 12" forearms. My upper body has always given me trouble. This is probably due to training more than anything, I know that; however I was able to loose weight before. The thing is, I lost weight rather easily, but only up to a point. I lost 30 pounds in 4-5 months, but then I couldn't get past the 22-24% bodyfat mark. I tried lowering my calories lower and lower every two week, until I got to about 1,900 and saw no change. I was at 2,400 when I got down to 22-24% BF. Then, I couldn't lift anymore because of my feet. I am/was flat footed. It got to the point where I couldn't even run, or jog anymore due to my feet. I had surgery on my left foot and I am having surgery on my right foot next month. I gained weight during my recovery. I was about 208 and I'm now at 232. I've tried to loose weight and even got to 1,800. I tried that for a few weeks and noticed no change at all. I recently started lifting again, but I am only doing upper body exercises, that I can do seated; due to the fact that I have an arch in only one foot at the moment and I can't squat and deadlift lopsided. So, I've just been doing seated preacher curls, hammer curls, dumbbell bench and seated dumbbell shoulder press. Since I didn't loose any weight at 1,800 calories and I started lifting again, I upped my calories to around 2,200 because I was getting so hungry only eating 1,800 a day.
For reference, I am between 5' 11" and 6'. I fluctuate between 1.81m and 1.82m.