title: Reference Equation for the Incremental Shuttle Walk Test in Children and Adolescents.
abstract: OBJECTIVE
  To determine a prediction equation for distance walked of incremental shuttle walk test (ISWT) and test its reliability in children and adolescents.
  
  
  METHODS
  Cross-sectional study, which included 108 healthy volunteers between 6 and 18 years old. Those who had an abnormal spirometry or had a history of chronic disease were excluded. Two ISWT were performed. Heart rate and peripheral capillary oxygen saturation (SpO2) were continuously measured during the test. Dyspnea and lower limb fatigue were assessed by Borg scale before and after the tests.
  
  
  RESULTS
  Boys walked longer distances compared with girls (1066.4 ± 254.1 m vs 889.7 ± 159.6 m, respectively, P < .0001). Except for dyspnea, there were no significant differences in the other outcomes measured (heart rate, lower limb fatigue, SpO2, and distance walked) at the peak of the two ISWT. The variables included in the predicted equation were age, body mass index, and sex. The predicted equation is: ISWTpred = 845.559 + (sex * 193.265) + (age * 47.850) - (body mass index * 26.179). The distance walked had an excellent reliability between the two ISWT, 0.98 (95% CI 0.97-0.99). The Bland-Altman plot shows agreement between tests (range from -40 to 45 m).
  
  
  CONCLUSIONS
  We established a prediction equation for ISWT. It can be used as a reference to evaluate exercise capacity for children and adolescents. ISWT has excellent repeatability and it is a maximal-effort field test for this age group.
authors: Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil. Electronic address: lanzafe@gmail.com.
authors: Fernanda de Cordoba
authors: Fde C
authors: Lanza
authors: School of Physiotherapy, Health Department, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Eduardo do Prado
authors: Edo P
authors: Zagatto
authors: School of Physiotherapy, Health Department, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Jacksoel Cunha
authors: JC
authors: Silva
authors: Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Jessyca Pachi Rodrigues
authors: JP
authors: Selman
authors: School of Physiotherapy, Health Department, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Treice Beatriz Gonçalves
authors: TB
authors: Imperatori
authors: School of Physiotherapy, Health Department, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Drielly Jésica Milani
authors: DJ
authors: Zanatta
authors: School of Physiotherapy, Health Department, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Luana Nascimento
authors: LN
authors: de Carvalho
authors: Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Mariana Mazzuca
authors: MM
authors: Reimberg
authors: Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho - UNINOVE, Sao Paulo, SP, Brazil.
authors: Simone
authors: S
authors: Dal Corso
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D001938:Brazil; D002648:Child; D003430:Cross-Sectional Studies; D015444:Exercise; D005080:Exercise Test / Q000379:methods* / Q000592:standards*; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D064368:Healthy Volunteers; D006339:Heart Rate; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D015203:Reproducibility of Results; D012737:Sex Factors; D013147:Spirometry; D016138:Walking