It is a measurement of how much air you can take into your lungs and how fast you can

blow it back out.

Before we do this test I want to make sure there's no medical reason that you cannot

take this test today.

Have you had any recent chest or eye surgery?

Okay how we do this test is by sitting up nice and tall in the chair making sure both

feet are on the floor and then you'll put nose clips on your nose then you'll put this

portion of the mouthpiece in your mouth past your teeth.

Get a good seal with your lips make sure your tongue is not in that hole then I'll have

you take two normal breaths in and out then a big breath in and blast it out hard and

fast keep blowing until I ask you to breathe in and come off the mouthpiece.

I will coach you through each step in the process so just listen to me and relax and

you'll do fine.

Okay you ready?

Put the nose clips on your nose and the mouthpiece in your mouth.

Get a good seal.

Just pretend you're sucking water through a straw and get a nice good

seal and take a normal breath in and empty that one all the way.

Empty, empty, empty, empty, empty, empty, empty, empty now another normal one in and

empty that one all the way.

Empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty,

empty, now big breath in, blow out hard.

Blow, blow, blow, blow, blow, blow, blow, blow, blow, blow, blow, keep blowing out all

the way, blow, blow, blow, blow, blow, blow, blow, blow, blow, blow, blow, breathe and

then come off.

Good, very good.

Okay I want to show you what your efforts look like on paper.

This is your big breath in and this is your big breath out and as you keep blowing it

comes down and makes this curve.

Good job.