Increased Anoxic Resistance Resulting from Short Period Heat Adaptation

Summary Mice were exposed to heat in an incubator kept ait 36-37°C for periods of 10 and 14 days. When removed from the incubator the mice were drowned in water of approximately body temperature and survival determined to the nearest second as witnessed by at least 2 observers. Heat adaptation increased anoxic resistance to drowning by 14.5% after 10 days and by 28.9% after 14 days. The mice kept at high temperature for 2 weeks lost approximately 10% of their weight but showed no change in body temperature.