- Go to slide 1 out of 7
- Go to slide 2 out of 7
- Go to slide 3 out of 7
- Go to slide 4 out of 7
- Go to slide 5 out of 7
- Go to slide 6 out of 7
- Go to slide 7 out of 7
Overview
Blow out as hard and fast as you can. You want to move the marker as far as you can with your breath, so concentrate on exhaling forcefully and quickly.
Review Date 1/22/2023
Updated by: Denis Hadjiliadis, MD, MHS, Paul F. Harron, Jr. Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.