Buy a new football. Sorry.
You have to inflate a football that you want to play with beecause you won't be able to kick it otherwise.
To fill with air is to inflate
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
A football can vary in sizes so you need to fill it according to the size you want it to be
Lungs expand to fill with air.
A football with full air is heavier.
How much air in football
there is air in a football.
Lungs expand to fill with air. It is done during respiration.