Summary
Changes in the testosterone concentrations after single sessions of endurance and strength training were measured in seven well trained men, experienced in both forms of training. Both training sessions were rated as hard to very hard on the Borg scale. Blood samples for testosterone measurements were taken before, immediately after, and 2, 4 and 6 h after the training sessions as well as the next morning. The mean tes tosterone concentration increased 27% (P<0.02) and 37% (P< 0.02) during the strength and endurance training session, respectively. Two hours after the training sessions the mean testosterone concentration had re turned to the pre-training level and remained at that level for the length of the observation period. There were no significant differences in the changes in testosterone concentration after strength and endurance training but there were large differences in the testosterone response at the level of the individual. A high correlation (r=0.98;P<0.001) for individuals was found between increases in testosterone concentration after strength and after endurance training. It was concluded that the changes in mean testosterone values followed the same timecourse after single sessions of strength and endurance training of the same duration and perceived exertion. The interindividual differences in tes tosterone response may be of importance for individual adaptation to training.
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Jensen, J., Oftebro, H., Breigan, B. et al. Comparison of changes in testosterone concentrations after strength and endurance exercise in well trained men. Europ. J. Appl. Physiol. 63, 467–471 (1991). https://doi.org/10.1007/BF00868080
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DOI: https://doi.org/10.1007/BF00868080