To keep their nasal airways open, so they can breath better.
They need all the oxygen they can get.
football players put air in theIR helmets because it is used to fill up space if the helmet is too big or some helmets have special pads that blow up that are more comfortable
You have to inflate a football that you want to play with beecause you won't be able to kick it otherwise.
its just called football they have to wear clothes
Yes we do wear cups
In their everyday life they wear exactly what you would wear.
because if they dont wear it they will be distracted by girls attracted by them
Football players can wear their casts during the game as long as they are able to still play when they are on. If they can play through the pain, then they are able to, but it is usually best to sit out when the players are hurt.
At every level of football, the pants are the same length but the NFL mandates that all players wear socks up to the knees to completely cover the legs.
Football players wear cleats, these are shoes with spikes on the bottom to give better traction to the person wearing them.