Felipe
I have a "maybe" answer for the leg strikes.
In many/most cases your leg is going to be the closest target. Your legs extend out from your torso so in most cases your leg is going to be closer than your torso. Sometimes all you need is target just a couple of inches closer.
If I can injure/damage your mobility then I have a great advantage.
Also might have something to do with the armor--torso is often fairly well protected---while the areas that need to move--the arms and legs, are often less well protected.
I would depend on many factors of course.
Besides, many people don't think about their legs--they protect the torso etc. but fail to protect the legs. You can even see it in karate etc. Styles that allow leg/groin attacks fight differently from those that do not allow such attacks.
Just a thought/s. Could well be wrong.
Chris Thomas
"While people are entitled to their illusions, they are not entitled to a limitless enjoyment of them and they are not entitled to impose them upon others."
"Team Cynicism" MVP 2005-2006
Currently on "Injured/Reserve" list due to a scathing Sarcasm pile-up.