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Cardiorespiratory variables in middle-aged men

M N Schmidt, J P Wrenn, E Vlahov

    Archives of Physical Medicine and Rehabilitation
    |October 1, 1977
    PubMed
    Summary

    This study found that older active men experienced declines in maximal heart rate and oxygen uptake with age. Cardiorespiratory fitness assessments in these age groups require multiple variables for accurate evaluation.

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    Area of Science:

    • Exercise Physiology
    • Cardiorespiratory Health
    • Aging Research

    Background:

    • Cardiorespiratory fitness is crucial for overall health, particularly in aging populations.
    • Understanding age-related changes in physiological markers is essential for effective exercise prescription.
    • Previous research indicates a decline in maximal aerobic capacity with age, but specific relationships in active middle-aged men require further investigation.

    Purpose of the Study:

    • To investigate the associations between age and key cardiorespiratory variables in active men aged 40-59.
    • To identify relationships among maximal heart rate, maximal oxygen uptake, and other physiological measures in this demographic.
    • To inform the comprehensive assessment of cardiorespiratory function in middle-aged and older active males.

    Main Methods:

    • Thirty-one active men (40-59 years) with an average of five years of running experience participated.
    • Subjects underwent maximal treadmill testing to volitional exhaustion.
    • Selected cardiorespiratory variables, including heart rate, oxygen uptake, and pulmonary ventilation, were measured.

    Main Results:

    • A significant negative correlation was observed between age and maximal heart rate (HR max) and age and maximal oxygen uptake (VO2 max) for the total group.
    • Positive correlations were found between various measures of VO2 max, O2 pulse, and maximal pulmonary ventilation (VE max) within age subgroups (40-49 and 50-59 yrs).
    • Resting heart rate (HR rest) showed a significant positive relationship with HR max and heart rate one minute post-exercise (1 min rec) in both age subgroups, though overall correlations were low.

    Conclusions:

    • Age is inversely related to maximal heart rate and maximal oxygen uptake in active men aged 40-59.
    • While certain cardiorespiratory variables correlate positively within specific age brackets, the overall low correlation coefficients suggest inter-individual variability.
    • Comprehensive cardiorespiratory assessment in these age groups should incorporate multiple physiological variables for a holistic evaluation.

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