Ventilatory demand during stepping and running: implications for Exercise-Induced Bronchoconstriction in children

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dc.creatorJessyca Pachi Rodrigues Selman
dc.creatorFernanda de Cordoba Lanza
dc.creatorGustavo Falbo Wandalsen
dc.creatorDirceu Solé
dc.creatorDenis O'Donnell
dc.creatorJosé Alberto Neder
dc.creatorSimone Dal Corso
dc.date.accessioned2022-03-14T23:42:40Z
dc.date.accessioned2025-09-08T23:06:08Z
dc.date.available2022-03-14T23:42:40Z
dc.date.issued2019-04-01
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.4187/respcare.09881
dc.identifier.issn1943-3654
dc.identifier.urihttps://hdl.handle.net/1843/40070
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofRespiratory Care
dc.rightsAcesso Aberto
dc.subjectExercícios respiratórios
dc.subjectVentilação pulmonar
dc.subjectAsma
dc.subjectAsma induzida por exercício
dc.subjectCrianças
dc.subject.otherExercise
dc.subject.otherVentilation
dc.subject.otherAsthma
dc.subject.otherDyspnea
dc.subject.otherExercise-induced asthma
dc.subject.otherChildren
dc.titleVentilatory demand during stepping and running: implications for Exercise-Induced Bronchoconstriction in children
dc.typeArtigo de periódico
local.citation.epage452
local.citation.issue4
local.citation.spage445
local.citation.volume64
local.description.resumoBACKGROUND: Single-step tests have been proposed as simple and inexpensive challenges todiagnose exercise-induced bronchoconstriction (EIB) in the pediatric population. Work performed and the resulting ventilation, however, might be substantially lower in stepping than running. This might decrease the diagnostic yield of step-based challenges. METHODS: In a cross-sectional study, 53 children with asthma with exercise-related symptoms (34 boys, age 6–18 y) underwent an incremental stepping test, a 6-min constant stepping test, and a treadmill running test on different days. RESULTS: Constant and incremental stepping tests presented with lower metabolic demands (V˙ O2 1.42 0.48 and 1.34 0.55 L/min, respectively), ventilatory demands (V˙ O2 45 14 and 43 16 L/min, respectively), and cardiovascular demands (160 20 and 161 19 beats/min, respectively) than the treadmill running test (1.65 0.60 L/min, 54 17 L/min, and 172 7 beats/min, respectively) (P < .05). Between-test agreement in diagnosing EIB was poor (kappa 0.217–0.361). Although EIB prevalence was higher after the treadmill running test (60%) compared to constant (53%) and incremental (47%) stepping tests, 7 subjects developed EIB only in stepping. Clinical and resting functional characteristics did not differ in iscordant subjects (ie, EIB negative in a given test but positive in another) versus concordant subjects (ie, EIB negative or positive in both tests). EIB was not related to individual test ability in eliciting high to very-high ventilation (> 40% or > 60% maximum voluntary ventilation, respectively). Moreover, a negative stepping test but a positive treadmill test (and vice versa) was not associated with greater ventilatory demands. CONCLUSIONS: Lower prevalence of EIB in stepping compared to treadmill running is not related to less ventilation demand in the former modality. Although stepping might be useful as a screening EIB test due its portability and low cost, a negative test should be confirmed with a running-based test in symptomatic children.
local.identifier.orcidhttp://orcid.org/0000-0002-4748-6947
local.identifier.orcidhttps://orcid.org/ 0000-0002-8019-281X
local.identifier.orcidhttps://orcid.org/ 0000-0001-9190-6796
local.identifier.orcidhttps://orcid.org/0000-0001-9182-7385
local.publisher.countryBrasil
local.publisher.departmentEEF - DEPARTAMENTO DE FISIOTERAPIA
local.publisher.initialsUFMG
local.url.externahttp://rc.rcjournal.com/content/64/4/445.full

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