For the 10 to 12 million Americans suffering from asthma, winter often means trouble. Asthma is characterized by inflammation of the lining of the airways.
Winter can cause other problems.
As many as 85 percent of people with asthma will have an attack when they exercise during the winter months. Mansmann says even shivering will make an individual use more oxygen. He says patients with pulmonary problems should realize that certain types of activities are better for them than others. Skiing and long-distance, nonstop activities such as running should be avoided. Walking, leisurely bicycling, and swimming are more easily tolerated.