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Maximal and submaximal exercise in different positions

F J Diaz, R D Hagan, J E Wright

    Medicine and Science in Sports
    |January 1, 1978
    PubMed
    Summary
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    Treadmill testing yielded higher maximal aerobic power (VO2 max) than cycling, regardless of cycling position. However, submaximal exercise on the bicycle ergometer showed similar physiological responses across different sitting postures.

    Area of Science:

    • Exercise Physiology
    • Cardiorespiratory Fitness

    Background:

    • Assessing maximal aerobic power is crucial for evaluating cardiorespiratory fitness.
    • Treadmill and cycle ergometers are common tools, but their comparative validity requires further investigation.
    • Ergometer positioning may influence physiological responses during exercise.

    Purpose of the Study:

    • To compare maximal aerobic power (VO2 max) measured via treadmill versus cycle ergometry in upright and low-sitting positions.
    • To evaluate cardiorespiratory and cardiovascular responses during maximal and submaximal exercise across different testing modalities.
    • To determine the influence of ergometer position on exercise intensity relative to maximal capacity.

    Main Methods:

    • Seven males and five females underwent maximal aerobic power tests.

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  • Testing included a treadmill protocol and cycle ergometry in both upright and low-sitting positions.
  • Measurements included maximal oxygen uptake (VO2 max), pulmonary ventilation, and heart rate.

    • Main Results:

    • Treadmill VO2 max was significantly higher (4.0% and 11.2%) than upright and low-sitting cycling, respectively.
    • Maximal pulmonary ventilation, respiratory measures, and heart rate were comparable across all three tests.
    • Submaximal cycling workloads elicited similar oxygen uptake, ventilation, and heart rate in both upright and low-sitting positions.

    Conclusions:

    • Treadmill testing may overestimate maximal aerobic capacity compared to cycle ergometry.
    • Cycle ergometer position does not significantly affect submaximal exercise responses.
    • These findings have implications for standardized cardiorespiratory fitness assessments.