Shin pads.
In soccer (football) there are shin guards which cover your shins, obviously. But there are no manditory leg pads. You could google FIFA laws of the game to see if you are allowed to wear other pads but you are not required. Hope this helps
They are commonly referred to as "Shin Pads" or "Shin Guards".
Batsman normally wares a cricket helmet, padded cricket gloves, elbow pads, jock strap and leg pads. A wicket keeper normally where leg pads, wicket keeping gloves, a jockstrap and leg pads. Depending on the individual they may also ware more specialised padding for protection against the ball.
Box lacrosse goalies do wear leg pads made of hard plastic material like a big shin guards, in field lacrosse goalies can only wear soccer style shin guards
the size of the leg pads
use bubble rap for leg pads
mainly your right leg
They are called hock boots and they are worn to protect th horses leg when jumping.
brian or vaughn
It is probably the leg
If you mean simply redirecting the ball with your head that is called a header.
Basketball are sport because it encourage people that love basketball, to be tall, and soccer is a sport because it make your leg stronger. like me I play soccer now my leg is incredible.