Well there was guard stays

Which a lot of people started to have, Ronaldo being one of the first I think.
Im not sure who was the first but Ronaldo started to do this very early on, he must spend about an hour putting that much tape on.
and Andreas, without sounding like a twat I don't think theres really anything more to it, just that it makes that area less bulky and more compact therefore more accurate? Nike said that the osi sleeve, which is similiar to this, gets blood going to the legs because of the pressure against the skin.