Endotoxin, a component of the bacteria believed to trigger an immune response in humans, found in the dust.

Researchers at the School of Medicine, University of Cincinnati found persistent wheezing (a warning sign of asthma and other lung problems) in 36 percent of children aged three years who had been exposed to high levels of traffic pollution and endotoxin indoors when they were babies.

A comparison of wheezing was observed in eleven percent of children had been exposed to babies with low levels of allergens indoors and outdoors, and in 18 percent of children exposed to high levels of traffic pollution and low levels of indoor endotoxin. Endotoxin exposure alone appeared to have little effect on children, the authors of the study.

“There is a clear synergistic effect of joint exposure to traffic-related particles and endotoxin that goes far beyond what can be observed in a single exposure that could be related to persistent wheezing three years,” he said in A press release from the university study author Patrick Ryan, research assistant professor of environmental health. “These two sources of exposure, when simultaneously present in high levels, appear to work together to impact negatively on the health of children with developing lungs.”

“The traffic-related particles and endotoxin seem to trigger an inflammatory response in the children monitored in this study. When put together, this effect is amplified to have a greater impact on the body’s response,” said Ryan. “The earlier in life this exposure, the greater its long-term impact. Lung development occurs in children up to 18 or 20 years. The early exposure to endotoxins and traffic will have a greater impact on the lungs development compared with adults, whose lungs are already developed. ”

The findings appear in the Dec. 1 issue of the American Journal of Respiratory and Critical Care Medicine.

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The free running, which is the basis of the running, athletics, and sports like football or basketball, is the activity which can produce bronchospasm. As there is usually a refractory period of 2 to 4 hours’ duration in the exercise-induced asthma during which no bronchospasm occurs again, however much they continue to exercise, so running causes an intense and continuous more bronchospasm that perform the exercise intermittently.

Activities that cause exercise-induced asthma. In order of severity are:

• Free Race
• Career treadmill
• Cycling
• Swimming

In addition, sports like swimming in warm pool (hot and humid air), gymnastics, walking, golf, hiking and biking on level ground are much less asmógenos. The tennis and ball games, but require much free running, usually take the form of intermittent heavy exertion, so are also good, like the martial arts (judo, karate, taekwondo), fencing, etc..

The deep diving with compressed air cylinders is not an activity recommended by the pressure changes involved, and unable to cope with an asthma attack at a certain depth: In the midst of a crisis of dyspnea, it may be very difficult to carry out maneuvers required for decompression to the surface without risking barotrauma.

The mountain sports in asthmatics (mountaineering, alpine skiing and background, etc.) only have the problem of breathing cold, dry air, which can be minimized by the use of masks or helmets.

In the Barcelona Olympics (1992) found that between 8 and 12% of competitors were asthmatics. As is well known, there are great athletes who were declared as asthma, in cycling (Alex Zülle, Miguel Indurain), athletics (Jordi Llopart, Patricia Morales), sailing (Theresa Zabell), taekwondo (Gabriel Esparza), swimming (Mark Spitz ), synchronized swimming (Beth Fernandez), judo, basketball, etc..

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Benefits of exercise in children with asthma:

• Improved child development
• Improving physical fitness and exercise tolerance itself
• The attacks caused by stress are reduced or are less strong
• The crises are best controlled
• It helps to reduce the nervousness caused by the attacks.

But keep in mind that at least 80% of children with asthma may have a bronchoconstriction with sports, unless appropriate measures are taken). However, given the benefit of sport psycho and integrator, is a great error overprotect the asthmatic child and prevent a normal level of exercise.

When we begin a physical activity for the first time we all get tired, feel fatigue and breathlessness. In the asthmatic child who has done sports before, these feelings are even stronger. Therefore, the adaptation of the child with asthma sports activity should be very gradual, so that eventually learn to distinguish between normal breathlessness by intense exercise and breathlessness by an asthma attack.

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