Validity of peak oxygen uptake calculations from heart rate deflection points

International Journal of Sports Medicine
M J de WitA P Hollander

Abstract

Two graded exercise tests on a cycle ergometer were examined in regard to their predictability of the peak oxygen uptake (VO2peak) based upon the deflection points (Dp) in the heart rate curves. The "constant duration" test (DUR-test) was based upon data from a previous maximal test. The "constant distance" test (DIS-test) was based upon the subjects' body weight and fitness level. In both tests 29 male subjects, 25 to 35 years, pedalled until exhaustion and from these tests the Dp variables (heart rate, DpHR, and the workload, DpW) and the VO2peak were determined. The subjects also underwent the Astrand & Ryhming-test (A&R-test). Deflection points could be detected for 15 subjects (52%) in the DUR-test and for 18 subjects (62%) in the DIS-test. In 13 subjects a Dp in both tests could be determined with a test-retest correlation coefficient of r = 0.66 for the DpHR and r = 0.79 for the DpW. Multiple regression analysis yielded the following equations: VO2peak = 7.7538 + 0.0199 DpW-0.0506 DpHR (n = 15; r = 0.87; SEE = 0.291.min-1) for the DUR-test and VO2peak = 5.8673 + 0.0200 DpW -0.0354 DpHR (n = 18; r = 0.88; SEE = 0.401.min-1) for the DIS-test. Compared to the measured VO2peak of the DUR-test and the DIS-test, the calculated...Continue Reading

Citations

Sep 16, 2003·Clinical Rehabilitation·Yildiz AnalayResa Aydin
Feb 8, 2008·Physiological Measurement·Alexander StahnElmarie Terblanche
Jul 25, 2000·Sports Medicine·M E Bodner, E C Rhodes

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