Exercising taxes your body's resources, so it's not surprising that many people experience shortness of breath during vigorous physical activity. Sometimes an inability to catch your breath is just a sign that you are out of shape. Other times, it could indicate a serious health problem. If your shortness of breath feels abnormal, contact a doctor immediately. If your doctor says you're fine, exercise regularly to strengthen your cardiovascular system.
Function
Shortness of breath during exercise is a common symptom of minor body fatigue, especially if you are out of shape. When you exercise, your muscles use oxygen. Your heart compensates by beating faster to deliver more oxygen, but if your cardiovascular system is underdeveloped, it won't be able to keep up with the demand. Your brain then triggers an increased breathing rate to draw more oxygen into your lungs for dispersal.
Effects
Performing cardiovascular exercise several times a week increases your body's endurance and improves the function of your cardiovascular system. Improved cardiovascular function means that your body operates more efficiently. If you exercise regularly, eventually long periods of vigorous exercise won't fatigue you as much, and you'll be less likely to experience shortness of breath.
Considerations
If you experience severe shortness of breath after minimal exercise there may be a problem, especially if there are accompanying symptoms. You might have a respiratory condition that makes it difficult for your body to obtain the oxygen it needs. For example, symptoms of exercise-induced asthma include wheezing, coughing, chest tightness and prolonged shortness of breath. Typically, the symptoms appear after five to 10 minutes of working out and then disappear within an hour. Another possibility is decreased heart function due to disease or a physical abnormality.
Expert Insight
The best way to find out the cause of abnormal shortness of breath is to talk to your doctor. Tell your doctor how often you experience shortness of breath and what activities immediately precede the onset of symptoms. Your doctor will analyze your current physical condition, including your weight, fitness level, age, medical history and relevant lifestyle factors, such as tobacco use and typical diet. With that information, your doctor can decide if further tests are warranted.
