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Thermogenesis with relation to exercise and exercise-training.

J Leblanc

    Acta Medica Scandinavica. Supplementum
    |January 1, 1986
    PubMed
    Summary
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    Regular exercise training improves the body's ability to regulate temperature in both heat and cold. Long-term exercise may also reduce post-meal heat production by altering metabolism.

    Area of Science:

    • Exercise physiology
    • Thermoregulation
    • Environmental adaptation

    Background:

    • Exercise in extreme temperatures triggers adaptive thermoregulatory responses.
    • Adaptations include enhanced sweating in heat and improved circulation in cold extremities.
    • Long-term exercise generally does not alter thermogenesis, except potentially after refeeding.

    Purpose of the Study:

    • To investigate the adaptive thermoregulatory reactions to exercise outside the thermal neutral zone.
    • To explore the long-term effects of exercise on thermogenesis, particularly concerning postprandial heat production.

    Main Methods:

    • Analysis of thermoregulatory responses during exercise in hot and cold environments.
    • Assessment of cutaneous circulation and sweat efficiency.

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  • Evaluation of long-term effects of exercise on thermogenesis and nutrient metabolism, including hormonal influences.

    • Main Results:

    • Exercise training enhances sweat efficiency in heat, mitigating hyperthermia risk.
    • Improved cutaneous circulation in extremities minimizes cold-induced discomfort and frostbite risk.
    • Long-term exercise training does not significantly affect basal thermogenesis but may reduce postprandial heat production.

    Conclusions:

    • Exercise-training induces significant thermoregulatory adaptations beneficial for performance and safety in extreme environments.
    • Reduced postprandial thermogenesis in trained individuals may stem from altered nutrient metabolism, potentially influenced by insulin and norepinephrine.