TY - JOUR T1 - Do field walking tests produce similar cardiopulmonary demands as an incremental treadmill test in obesity? JF - European Respiratory Journal JO - Eur Respir J VL - 40 IS - Suppl 56 SP - P4772 AU - Rachael Evans AU - Thomas Dolmage AU - Priscila Robles AU - Roger Goldstein AU - Dina Brooks Y1 - 2012/09/01 UR - http://erj.ersjournals.com/content/40/Suppl_56/P4772.abstract N2 - Cardio-respiratory fitness assessed by peak oxygen uptake (VO2pk) is an independent predictor of mortality in obesity. We investigated whether VO2pk measured during corridor walking tests was similar to that measured by an incremental treadmill (ITM) test in obesity.MethodsIndividuals with a BMI >30 were recruited from a sleep clinic. All patients had treated Obstructive Sleep Apnea. Patients with chronic lung or heart disease were excluded. Participants completed an ITM test; the gold standard to determine VO2pk, two six-minute walk tests (6MWT) and two incremental shuttle walk tests (ISWT) on three separate days in a randomised order. Expired gas analysis was performed during all tests. The difference between the peak parameters for the two corridor tests compared to the ITM was assessed by Dunnett test.Results16 patients completed the study: 8 male, mean [SD] age 58 [12] y, BMI 36.1 [7.6] kg/m2. The results of the second walking test were used. Table 1 shows the peak parameters for the three tests.View this table:Table 1The limits of agreement for VO2 pk between the ISWT and the ITM was 730 ml/min.Conclusion.In obesity, the ISWT VO2 pk more closely reflects ITM VO2pk than the 6MWT VO2pk, but is not predictive in an individual. ER -