Bronchoconstriction is a condition in which the smooth muscles of the bronchus contracts. The bronchus is a pathway that moves air to and from the lungs. This muscle contraction causes the bronchus to narrow and restrict the amount of air passing into and out of your lungs. Bronchoconstriction usually occurs in asthma, emphysema, and other lung diseases. However, bronchoconstriction can also happen to those without any lung disease during intense exercise. The specific cause of bronchoconstriction isn’t known. However, some things are known triggers of bronchoconstriction as well as asthma. These triggers may include:
Common trigger of bronchoconstriction is intense or strenuous exercise. When this condition happens to someone with asthma, it’s called exercise-induced asthma. However, it can also sometimes occur in people who don’t have any type of lung disease. In this type of constriction the bronchoconstriction only happens when the people are performing strenuous exercise. The condition is alleviated when the exercise is stopped. This can be called as exercise-induced bronchoconstriction (EIB). The triggers of EIB may include those listed above for bronchoconstriction in general. But the primary trigger of EIB is endurance activities. This type of activity includes long periods of deep breathing.