Instagram photo by joejefferyukAnother piece of evidence to support 'more is not better' when it comes to endurance exercise.
Men performing high levels of regular long duration intense endurance exercise display lower levels of libido when compared to men performing shorter duration, less intense and less frequent endurance exercise.
It would be great to see a similar study repeated in a resistance training model, but this at least gives us a base idea that in our context excessive volume, frequency and intensity of training could reduce libido in males. (Ref. Endurance Exercise Training and Male Sexual Libido.
Hackney, Anthony C.; Lane, Amy R.; Register-Mihalik, Johna; OLeary, Colin B.)