Exercise-Induced Asthma
Vigorous exercise with high levels of physical activity can induce asthma particularly in children. When Whitney had her asthma attack, her breathing became more rapid, the temperature within her airways increased, and the muscles around the bronchi contracted, causing a narrowing of the airways. Whitney’s symptoms, which may occur within 5 to 20 min after the start of vigorous exercise, include shortness of breath, wheezing, and coughing. Whitney now does several things to prevent exercise induced asthma. She uses a pre-exercise inhaled medication before she starts her activity. The medication relaxes the muscles that surround the airways and opens up the airways. Then she does a warm-up set of exercises. If pollen counts are high, she avoids exercising outdoors.
Whitney’s lung capacity was measured as 3.2 L at a body temperature of 37 °C and a pressure of 745 mmHg. How many moles of oxygen are in her lungs if air contains 21% oxygen
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