Since you do have asthma, it is best if you discuss this with your doctor to make sure you are both in agreement about what you can and cannot do. Here is some general information that you may want to share with him/her in making up your exercise program:
This a great time of year for that question because swimming is recommended as the ideal sport for asthmatics because the air is humidified, and exhaling underwater prolongs exhalation and increases end-expiratory pressure, which will help get your lungs in shape. Weight lifting is another excellent choice to get into shape because it does not require sustained exertion.
Remember, you should not participate in sports unless your asthma is well controlled (with or without daily medication). That means that your not having a lot of symptoms (coughing, wheezing, shortness of breath, pain around the chest) when you are not exercising.
Here are a few basic commonsense tips to help you safely exercise with asthma:
You should be able to participate in physical activity as long as your asthma is controlled and conditions are good. The most important thing is to learn what your limits are and know when to stop and when to use your bronchodilator.