Bronchial hyperresponsiveness (BHR) and physical activity

We read with interest the recent paper by Shaaban et al 1 who report a negative relationship between bronchial hyperresponsiveness (BHR) and physical activity. Several hypotheses are invoked to explain this association, including a suggestion that physical activity reduces bronchial inflammation by altering airway physiology. Their major hypothesis is that obesity reduces physical activity and that it is this reduction in physical …