Certain types of exercise can have a damaging effect on male sperm production. One of the worst forms of exercise for this is cycling or mountain biking. Mountain bikers have been proven to register less then half the sperm count and sperm movement than non-cyclists. The semen alterations are thought to be caused by impounding damage to both the testes and the scrotum, the repeated trauma is considered to be the main reason for the vascular damage and the subsequent effects on sperm motility.
Oh ****
Only a small portion(no pun intended)is part of my cv regime at the gym, lol
Mostly is cross trainer, stepper, and some weight training(nothing heavy, only body toning)