title: Exponential protocols for cardiopulmonary exercise testing on treadmill and cycle ergometer.
abstract: An extended exponential exercise protocol was validated by comparing submaximal and maximal parameters with those obtained by linear protocol. Normal subjects (n = 16, 20-69 years) undertook maximal exercise tests on treadmill and cycle ergometer. The subjects had a wide range of exercise capacity, and all were accommodated by the protocol. Mean oxygen uptake (V(O2)) agreed between protocols at gas exchange anaerobic threshold (theta) (95% CI of difference -0.1 to +0.06 l min(-1)) and at peak (95% CI of difference -0.1 to +0.1 l min(-1)). Mean pre-thetaDeltaV(O2)/Deltawork rate (W) slope on the cycle ergometer agreed between protocols (95% CI of the difference -0.9 to +0.25 ml min(-1) W(-1)). Post-thetaDeltaV(O2)/DeltaW slope was steeper than pre-theta, and steeper by linear than by exponential protocol (P = 0.0001). It is concluded that the exponential protocol is valid for the measurement of submaximal and maximal exercise parameters in subjects with a wide range of exercise capacity.
authors.affiliation: Queen's University of Belfast, Belfast, UK. J.P.Jamison@qub.ac.uk
authors.forename: J P
authors.initials: JP
authors.lastname: Jamison
authors.forename: J
authors.initials: J
authors.lastname: Megarry
authors.forename: M
authors.initials: M
authors.lastname: Riley
mesh_terms: D000465:Algorithms; D004867:Equipment Design / Q000379:methods*; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000295:instrumentation / Q000379:methods*; D006321:Heart / Q000502:physiology*; D006801:Humans; D010100:Oxygen / Q000502:physiology; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D011652:Pulmonary Circulation / Q000502:physiology*; D013997:Time Factors
chemical_list: D010100:Oxygen