Incidence of asthma, which affects about 5.3 percent of adults and 6.3 percent of children, has more than doubled since 1980. The richer the country, the more obesity and asthma. But within the richer countries, it's the poorer people who have more asthma and obesity. Experts offer many other theories to explain the poverty-asthma connection. For example, the poor are more likely to live in run-down housing with allergens such as dust mites, cockroach droppings and mold.
Physical activity helps relieve asthma in a variety of ways.
When you're out of condition, you're less likely to get this broncho-dilating effect. Excessive weight on the chest can make it difficult to expand the lungs, notes Wenzel, who says exercise's potential for weight loss also can help people breathe easier. I've had a lot of patients with asthma report they've benefited from taking karate, which teaches breath control. In general, anything that promotes relaxation is going to be beneficial. Many asthma sufferers are turning to yoga, which centers on deep, focused breathing and tension relief.