Exercise induced asthma is quite common and the general consensus is
to avoid those activities that trigger it, but avoiding all exercise is not necessary or a good alternative, since the right kind of exercises actually helps strengthen the lungs and helps to prevent or diminish asthma attacks.
Playing sports you love and getting regular exercise is an important part of a healthy lifestyle, however for some asthma sufferers exercise can actually trigger an asthma attack by drying out the airways. Fortunately, there is a solution.
There are several things that you can do ensure active life:
Moist, warm air prevents the airways from becoming dry, so using a good humidifier in the home or gym will help those who live in a dry climate.
Next, if you are out of shape, you will need to increase your fitness level gradually by activities such as yoga, walking, cycling and swimming. Those allergic to chlorine should find a warm lake or sea to swim in. Continuous running can trigger asthma, so team sports that require short bursts of running are far better.
Avoiding temperature changes is also important: cold air entering the lungs at a rapid rate will dry out the airways and cause an asthma attack. Working out in gym is a good alternative to exercising outdoors in cold weather. One very important thing to be aware of is to make sure to avoid becoming dehydrated, which will trigger an attack. (see "How Water Can Help Prevent Asthma Attacks")
When you have strengthened your lungs through exercise, you are much more likely to reduce the threat of an asthma attack. However if you still experience asthma symptoms when you excerise, there are simple, safe and natural asthma and allergy treatments available, which many people have found to be highly effective. Drugs are not your only option.