Okay i was reading an older issue of MD and came across this article titled Mitochondrial Bio-genesis. Which, as how i understood, meant that when supersetting opposing muscle groups ex- bi, tri or back and chest, that they work synergistically(sp) and somehow increase the rate at which mitochondria in the areas worked burn more fat. Also another thing that was said was that when working the opposing muscle groups in a superset, the 2nd muscle worked is given a boost in stregth in the result of the previous muscle (opposing muscle) that was just worked enables this.
Im sorry for the 'somehow' type of comments but the reason i brought this up was to find out what you guys know about this and could either correct this info or to give me more detail as to what exactly is happening that enables these events to occur. Thanks everyone, just wanting to learn more!