Exercise has immediate effects on the respiratory system. It causes an increase in the:
Regular exercise has some additional effects, including an increase in the:
Asthma affects the bronchioles, the small tubes that carry air in and out of the lungs. If you have asthma your airways can become inflamed, swollen and constricted (narrowed), and excess mucus is produced. More than 5.2 million people in the UK receive treatment for asthma, including 1.1 million children.
During an asthma attack:
The symptoms of an asthma attack include wheezing, a tight chest and difficulty breathing. Symptoms can be treated using asthma relievers. Relievers are drugs that relax and open up the airways, making it easier to breathe. Relievers are often administered using a device called an inhaler. This lets you breathe the medicine in through your mouth, directly into your lungs.
Lung volume can be measured. One way involves a measuring cylinder, marker pen, plastic or rubbing tubing, bowl of water and large plastic container (big enough to contain about 4.5 litres of water). The first job is to calibrate the container:
To measure a volume, blow through the tubing so that the air pushes water out. After a deep breath, the volume of the water that you expel from the bottle is the same as the volume of your lungs. Read the volume of air produced using your markings.