Exercise maintains a high libido in men on androgen deprivation therapy.

In 2013 a randomised control trial was performed on men with prostate cancer undergoing androgen deprivation therapy. The men with high libidos in the exercise intervention group were able to maintain their high libidos. The men with high libidos in the control (no exercise) group no longer had a high libido at the end of the 12 week study period.

Cormie, P. 2013

https://www.ncbi.nlm.nih.gov/pubmed/23318529