This is a fairly common question and in almost every case it is a good idea to exercise even if you do have asthma. Some patients notice that their asthma gets worse after exercising, but if you keep your asthma inhaler close by you should be able to overcome this obstacle. Asthma prevention treatments and asthma inhalers can help you reduce any potential side effects of your condition while you are exercising. If you are worried about this issue or if you experienced asthma attacks during exercise in the past, it is a good idea to gradually start exercising and see where you feel comfortable doing it.