You have asthma, but physical activity remains a priority. Good for you, because exercise helps control weight, blood sugar and insulin levels, reduces risk of heart diseases and some cancers, and helps your brain stay sharp. It improves sleep, sexual health, and your chance of living longer. A lifelong allergy sufferer, allergist-immunologist Derrick R. Ward, M.D., of Kansas City Allergy & Asthma Associates, P.A., wants you to stay healthy and keep moving as you manage your asthma. Here's how.