Im exactly 6 feet and during the course of this year i went from 220 pounds to 175 and now im up to 180. My biceps, quads, triceps, shoulders all developed greatly over this year, but my chest is still weak. I do see significant changes, but my body is just not hard like my friend. I know for a fact he's not taking steriods and he even eats junk food frequently. How did he increase his strength so much while i stayed the same? We work out the same stuff and whenver we do he just seems to be lifting heavier and heavier.