Metabolic rates were compared on seven young men performing three levels of physical activity at three environmental temperatures of 70, 85, and 100 F. This study indicates that as the environmental temperature increases there is also an increase in metabolic rate of men performing a fixed activity. It has been shown that there was a significantly higher metabolic rate for men working at 100 F than at 85 and 70 F. These increases averaged 11.4% for the rest period, 13.3% for the moderate activity, and 11.7% for the heavier activity. Body temperatures also were significantly higher at 100 F than at 85 and 70 F environments (P < .005). They averaged 99.6 F for the 100 F temperature, and 99.1 F for both the 85 and 70 F temperatures. The findings in this study indicate that the metabolic rate of a fixed physical activity is increased in the heat and that this increase is not due to acclimatization or training. Submitted on September 19, 1962
Five separate experiments were performed to evaluate the effects, if any, of Mg and K salts of aspartic acid on the swimming times of rats and dogs. Experiments 1 and 2 were with rats doing a single swim-to-exhaustion in water maintained at 17 C and 25 C. In experiment 3 dogs performed a single swim-to-exhaustion in 17 C water. During the first three experiments each animal underwent two treatments; a no-treatment control, and an aspartate therapy. Experiment 4 was a long-term single swim-to-exhaustion test. The rats were divided into two groups: one group receiving a placebo and the other group receiving aspartate. Each group swam to exhaustion in 25 C water twice a week for 6 weeks. Experiment 5 was of the same experimental design as experiment 4 with the exception that a double swim-to-exhaustion was used to measure performance. Statistical analysis of the mean swimming times for both rats and dogs in the five experiments showed that average swimming times under control and aspartate therapy were not significantly different. exercise; ergogenic drugs; swimming time to exhaustion endurance criterion Submitted on May 8, 1963
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