title: Association between Modified Shuttle Walk Test and cardiorespiratory fitness in overweight/obese adults with primary hypertension: EXERDIET-HTA study.
abstract: The aims of the study were to evaluate the relationship between Modified Shuttle Walk Test (MSWT) with peak oxygen uptake (V˙O2peak) in overweight/obese people with primary hypertension (HTN) and to develop an equation for the MSWT to predict V˙O2peak. Participants (N = 256, 53.9 ± 8.1 years old) with HTN and overweight/obesity performed a cardiorespiratory exercise test to peak exertion on an upright bicycle ergometer using an incremental ramp protocol and the 15-level MSWT. The formula of Singh et al was used as a template to predict V˙O2peak, and a new equation was generated from the measured V˙O2peak-MSWT relationship in this investigation. The correlation between measured and predicted V˙O2peakfor Singh et al equation was moderate (r = 0.60, P < .001) with a standard error of the estimate (SEE) of 4.92 mL·kg-1minute-1, SEE% = 21%. The correlation between MSWT and measured V˙O2peakas well as for the new equation was strong (r = 0.72, P < .001) with a SEE of 4.35 mL·kg-1minute-1, SEE% = 19%. These results indicate that MSWT does not accurately predict functional capacity in overweight/obese people with HTN and questions the validity of using this test to evaluate exercise intolerance. A more accurate determination from a new equation in the current study incorporating more variables from MSWT to estimate V˙O2peakhas been performed but still results in substantial error.
authors.affiliation: Laboratory of Performance Analysis in Sport, Department of Physical Education and Sport, Faculty of Education and Sport-Physical Activity and Sport Sciences Section, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Araba/Álava, Basque Country, Spain.
authors.forename: Borja
authors.initials: B
authors.lastname: Jurio-Iriarte
authors.affiliation: Laboratory of Performance Analysis in Sport, Department of Physical Education and Sport, Faculty of Education and Sport-Physical Activity and Sport Sciences Section, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Araba/Álava, Basque Country, Spain.
authors.forename: Ilargi
authors.initials: I
authors.lastname: Gorostegi-Anduaga
authors.affiliation: Primary Care Administration of Burgos, Hospital Santiago Apóstol, Miranda de Ebro, Burgos, Spain.
authors.forename: G Rodrigo
authors.initials: GR
authors.lastname: Aispuru
authors.affiliation: Cardiology Unit, Igualatorio Médico Quirúrgico (IMQ-Amárica), Vitoria-Gasteiz, Araba/Álava, Basque Country, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Pérez-Asenjo
authors.affiliation: Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA.
authors.forename: Peter H
authors.initials: PH
authors.lastname: Brubaker
authors.affiliation: Laboratory of Performance Analysis in Sport, Department of Physical Education and Sport, Faculty of Education and Sport-Physical Activity and Sport Sciences Section, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Araba/Álava, Basque Country, Spain. Electronic address: sara.maldonado@ehu.eus.
authors.forename: Sara
authors.initials: S
authors.lastname: Maldonado-Martín
mesh_terms: D000072599:Cardiorespiratory Fitness; D004562:Electrocardiography; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications* / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications; D050177:Overweight / Q000150:complications*; D000070857:Walk Test / Q000379:methods*
keywords: Equation for estimation; field test; peak oxygen uptake