Recently, I was reading "Exercise and Sport Science", an new exercise
textbook. In it, the hormonal responses to exercise were discussed.  It
seems there is a great deal of conflict over how certain types of exercise
cause the release of specific hormones.  This is also true for the hormones
related to body composition - testosterone, cortisol, and human growth
hormone.

This is in contrast to some generalizations I read on this site, that
anerobic exercise causes the release of "good" hormones, and high-volume
aerobics causes the release of "bad" hormones.  While this may be a simple
and appealing theory, it does not seem that science backs up this
generalization.