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Cardiorespiratory mobilization and endurance performance.

S Bailin, K J Stewart

    Journal of Human Ergology
    |September 1, 1976
    PubMed
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    Prior exercise at high intensity (170 bpm) worsened cycling performance, likely due to lactate buildup. Moderate prior exercise (110-140 bpm) showed no significant performance enhancement in this study.

    Area of Science:

    • Exercise Physiology
    • Sports Science
    • Cardiorespiratory Fitness

    Background:

    • Prior exercise (PE) may influence subsequent exercise performance by mobilizing the cardiorespiratory system.
    • The effect of varying PE intensities on energy reserve utilization and overall performance remains an area of investigation.

    Purpose of the Study:

    • To investigate the impact of prior exercise (PE) at different intensities on cardiorespiratory system mobilization and subsequent maximal exercise performance.
    • To determine if light to moderate PE can enhance performance by reducing the oxygen deficit during a criterion task (CT).

    Main Methods:

    • Twenty subjects completed an 11-minute cycling task on a bicycle ergometer.
    • PE was administered for 5 minutes at intensities targeting heart rates of 110, 140, or 170 beats/min, or omitted (no PE).

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  • The CT involved 10 minutes of cycling at 68 rpm against 3 kg resistance, followed by a 1-minute all-out effort.

    • Main Results:

    • Performance was significantly impaired following high-intensity PE (170 bpm) compared to no PE and lower intensities (110, 140 bpm).
    • This impairment is hypothesized to result from anaerobic metabolite accumulation, such as lactate.
    • Total work tended to be highest after PE at 110 bpm, but this did not reach statistical significance.

    Conclusions:

    • High-intensity prior exercise can negatively impact subsequent exercise performance.
    • Light to moderate prior exercise did not provide significant performance benefits, failing to support the hypothesis of improved oxygen deficit utilization.
    • Further research is needed to elucidate the precise mechanisms and optimal conditions for PE to enhance exercise performance.