Selman JP, et al. - Keeping in mind that single-step tests are simple and inexpensive challenges to diagnose exercise-induced bronchoconstriction (EIB) in children but the diagnostic yield of step-based challenges might decrease as work performed and the resulting ventilation might be substantially lower in stepping than running, researchers assessed ventilatory demand during stepping and running in 53 children with asthma with exercise-related symptoms (34 boys, age 6–18 y) included in this cross-sectional study. On different days, the participants underwent an incremental stepping test, a 6-min constant stepping test, and a treadmill running test. In stepping vs treadmill running, a lower prevalence of EIB was found, which was not associated with less ventilation demand in the former modality. Although portability and low cost of stepping might make it a useful tool to screen EIB, confirming a negative test with a running-based test in symptomatic children was recommended.