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Acclimation to heat of the beagle dog


Four beagle dogs showed evidence of heat acclimation (reduced post-exercise heart rate and body temperature) within 10 days of first exposure of one hour a day in a hot environment (38 ± 2°C). One hour of daily exercise (110 m/min, 0% grade) in the heat (as with human subjects) was adequate to produce the effects of heat acclimation. The physiological changes observed were due to heat exposure alone since the work which was done for training (110 m/min, 4% grade) at the control temperature (20 ± 2°C), was reduced in the heat (0% grade).


4 Hunde (Beagles) zeigten nach täglich einer Stunde Haltung bei 38 ± 2°C innerhalb 10 Tagen verminderte Herzfrequenz und Körpertemperatur nach Arbeit als Ausdruck einer Hitzeakklimatisation. Eine Stunde Laufen täglich (110 m/min, 0% Steigung) in der Hitze war ausreichend, um die Hitzeakklimatisation hervorzurufen. Dies war allein Folge der Hitze, weil die Arbeit bei Kontrolltemperatur von 20 ± 2°C (110 m/min, 4% Steigung) in der Hitze reduziert worden war (0% Steigung).


4 chiens de la race "Beagle" ont montré de façon probante qu'ils étaient acclimatés au chaud (moins forte augmentation des pulsations et moins haute température du corps) après avoir été placés, 10 jours durant, 1 heure dans un milieu chauffé à 32 ± 2°C. Une heure de marche par jour (110 m/min à 0% de pente) au chaud a suffi pour provoquer cette acclimatation. Les modifications physiologiques observées sont dues à la seule chaleur, vu que le travail effectué à la température de contrôle (soient 110 m/min par 4% de pente à 20 ± 2°C) a été adapté au milieu chauffé (110 m/min par 0% de pente).

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Supported by the Iowa Heart Association and the Iowa College of Medicine Fund. Dr C.M. Tipton kindly provided a treadmill and edited this paper.

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Folk, G.E., White, J.G. Acclimation to heat of the beagle dog. Int J Biometeorol 14, 95–101 (1970).

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