Table 1 Differences between the characteristics of exercise induced asthma and inspiratory stridor
Exercise induced asthmaInspiratory stridor
Occurs 5–10 min after exerciseOccurs during exercise and resolves within 5 min of stopping exercise
Wheeze on expirationWheeze on inspiration
Fall in FEV1 after exerciseNo fall in FEV1 after exercise
Sound is primarily from the chestSound originates in the neck
Responds to inhaled β2 agonist treatmentNo response to inhaled β2 agonist treatment
  • FEV1, forced expiratory volume in 1 s.