「Comparison of serum testosterone and corticosterone between exercise training during normoxia and hypobaric hypoxia in rats」

The purpose of this study was to compare the effects of continuous and intermittent exercise training on serum testosterone and corticosterone concentrations during normoxia and hypobaric hypoxia.  Continuous exercise induced decreases in [T] under both conditions. Intermittent exercise showed a tendency to increase [T] during normoxia, but caused a suppression during hypobaric hypoxia.
pp. 417-421
Hu Y, Asano K, Mizuno K, Usuki S, Kawakura Y

Eur J Appl Physiol Occup Physiol 78