title: A steep ramp test is valid for estimating maximal power and oxygen uptake during a standard ramp test in type 2 diabetes.
abstract: A short maximal steep ramp test (SRT, 25 W/10 s) has been proposed to guide exercise interventions in type 2 diabetes, but requires validation. This study aims to (a) determine the relationship between Wmax and V˙O2peak reached during SRT and the standard ramp test (RT); (b) obtain test-retest reliability; and (c) document electrocardiogram (ECG) abnormalities during SRT. Type 2 diabetes patients (35 men, 26 women) performed a cycle ergometer-based RT (women 1.2; men 1.8 W/6 s) and SRT on separate days. A random subgroup (n = 42) repeated the SRT. ECG, heart rate, and V˙O2 were monitored. Wmax during RT: 193 ± 63 (men) and 106 ± 33 W (women). Wmax during SRT: 193 ± 63 (men) and 188 ± 55 W (women). The relationship between RT and SRT was described by men RT V˙O2peak (mL/min) = 152 + 7.67 × Wmax SRT1 (r: 0.859); women RT V ˙ O 2 p e a k (mL/min) = 603 + 4.75 × Wmax SRT1 (r: 0.771); intraclass correlation coefficients between first (SRT1) and second SRT Wmax (SRT2) were men 0.951 [95% confidence interval (CI) 0.899-0.977] and women 0.908 (95% CI 0.727-0.971). No adverse events were noted during any of the exercise tests. This validation study indicates that the SRT is a low-risk, accurate, and reliable test to estimate maximal aerobic capacity during the RT to design exercise interventions in type 2 diabetes patients.
authors.affiliation: Subdivision MoveFIT-Sports Medicine, Department of Rehabilitation Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Rozenberg
authors.affiliation: Subdivision MoveFIT-Sports Medicine, Department of Rehabilitation Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
authors.forename: J B J
authors.initials: JB
authors.lastname: Bussmann
authors.affiliation: Department of Biostatistics, Erasmus MC University Medical Center, Rotterdam, The Netherlands.|L-Biostat, Catholic University of Leuven, Leuven, Belgium.
authors.forename: E
authors.initials: E
authors.lastname: Lesaffre
authors.affiliation: Subdivision MoveFIT-Sports Medicine, Department of Rehabilitation Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
authors.forename: H J
authors.initials: HJ
authors.lastname: Stam
authors.affiliation: Subdivision MoveFIT-Sports Medicine, Department of Rehabilitation Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
authors.forename: S F E
authors.initials: SF
authors.lastname: Praet
mesh_terms: D000328:Adult; D000368:Aged; D003924:Diabetes Mellitus, Type 2 / Q000503:physiopathology*; D004562:Electrocardiography; D005080:Exercise Test / Q000009:adverse effects / Q000379:methods*; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D015203:Reproducibility of Results
keywords: Validation; accurate; aerobic; anaerobic; ergometry; exercise; load; physical fitness