How would the air pressure inside a soccer ball change when you kick it?

The more pressure in the ball the firmer it will be to kick. A low pressure ball will concave around your foot when you kick it but a higher pressure ball will give less. The more pressure in the ball the more air pressure your moving when you kick it. Think of it like a bow; the father back it is drawn the farther the arrow will fly. The more pressure in the ball the more solid it is and therefore gives more energy for energy input.