What question did this study set out to answer?

To examine the relationship between oxygen intake, heart rate, and graded work rates, and to evaluate criteria for identifying true maximum oxygen intake.

November 1, 1959Journal of Applied Physiology

Maximum oxygen intake and maximum heart rate during strenuous work

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Authors

CWC. H. WyndhamUniversity of Toronto NSN. B. StrydomUniversity of the Witwatersrand JMJ. S. MaritzSouth African Medical Research Council

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Implication

Experimental physiological study demonstrates asymptotic leveling of oxygen intake and heart rate in trained men, indicating linear extrapolation underestimates true maximum oxygen uptake.

Key Points

To examine the relationship between oxygen intake, heart rate, and graded work rates, and to evaluate criteria for identifying true maximum oxygen intake.
Conducted at least five independent determinations of oxygen intake and heart rate across progressive work rates on a bicycle ergometer in four highly trained men (N=4) followed over a 4-month period.
Fitted mathematical response curves to the physiological data up to and above maximum levels of oxygen intake to test goodness of fit against linear and asymptotic models.
Oxygen intake and heart rate plot linearly against work rate at lower workloads, but both curve toward an asymptote at strenuous work rates, with oxygen intake approaching its plateau more slowly than heart rate.
Linear extrapolation of heart rate plotted against oxygen intake to reach maximum heart rate systematically underestimates measured maximum oxygen intake.
Maximum oxygen intake and maximum heart rate remained highly reproducible across 4 months of testing, demonstrating average coefficients of variation of 4.3% and 3.5%, respectively.

Cite This Study

Wyndham et al. (1959) studied this question.

synapsesocial.com/papers/6a71d071abc331a85807b098 https://doi.org/10.1152/jappl.1959.14.6.927

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Implication

Experimental physiological study demonstrates asymptotic leveling of oxygen intake and heart rate in trained men, indicating linear extrapolation underestimates true maximum oxygen uptake.

Maximum oxygen intake and maximum heart rate during strenuous work

Discussion

Member takes

Implication

Key Points

Cite This Study

Maximum oxygen intake and maximum heart rate during strenuous work

Discussion

Member takes

Implication

Key Points

Cite This Study

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