“Exercise is good for most people, even asthmatics who have their doctor's approval. The American Council on Exercise offers these suggestions to help reduce your risk of an asthma attack while exercising:
Keep your inhaler or other asthma medication nearby, in case you become short of breath during exercise.
Warm up for at least 15 minutes before exercise.
Take plenty of time to cool down, and slowly decrease your activity.
Drink plenty of water before exercise.
Don't exercise outdoors when air quality is compromised by allergens or pollution.
Don't overexert yourself.
Breathe deeply, in through your nose and out through your mouth.
Don't push yourself too much. Give yourself a break, especially if it feels like you're on the verge of an asthma attack.”