so the ideal phsyique would be slim with no fat/muscle, like a skeleton. i should live forever then, lol.
but seriously, its all about a balance, your bodies natural shape should be adhreerd to, as soon as you start unnaturally piling on muscle you increase the amount of blood and area/distance for the blood to be pumped which is not good as your heart will not increase in size and stay healthy to cope with the extra work. those big body builders you see on tv are doing the same as putting a 6.00ltr v12 turbo engine in a 1.2ltr economy hatchback car and expecting the old miniscule fuel pump to do the extra work, it wont for long!
not saying we are all comparable to 1.2ltr economy hatchbacks, but you get the picture.