Why are balloons harder to inflate when you start, and feel easier once they start expanding?

Question

I mean your average party balloon, when it’s completely deflated, it seems you have to put extra effort into getting it going. As soon as it starts inflating, you need less effort.

In: Physics

Answer 1

There is no pressure inside the balloon when start blowing into it. The material is also more dense in the tiny amount of area available for air.

Once the material has expanded and there is more pressure inside the balloon, blowing it up requires left effort because the material is more pliable and there is already air inside the balloon to help.