If kids have asthma, are there certain activities that they should avoid doing?

Some sports are especially likely to cause asthma attacks. Vigorous sports performed in cold air -- such as cross-country skiing, ice skating, and ice hockey -- top the list. Sports that require intense effort with little or no letup rank second, including soccer, long-distance running, and competitive cycling. Swimming, on the other hand, which is done in a humid environment, rarely brings on attacks. And stop-and-go sports such as baseball, softball, karate, sprinting, and golf are low-risk workouts for asthma sufferers.