Let the air slowly out of the balloon and tell students this represents what happens when we breathe out or exhale. Next, ask students to sit down and to bring their chests down to their knees. Tell them to take a deep breath and ask them how it felt. When we breathe, air constantly moves in and out of the lungs. Tobacco smoke from cigarettes can make it hard to breathe.
Students simulate shortness of breath.
Ask students to stand up again and to close their mouths and partially close their noses with their fingers. Then ask them to run in place for 10 seconds. Brainstorm physical activities. Ask students to call out their favorite physical activities. Write responses on the board.