Long ride racing: the height of the racing handlebar is lower than the seat, the center of gravity leans forward, waist curvature increases, the perineum of the testicles, prostate gland close to the cushion, subject to prolonged extrusion will be ischemic, edema, inflammation, affecting the production of sperm and the normal secretion of prostatic fluid and semen and cause infertility. Therefore, young men should not ride racing for a long time, should not exceed one hour a day, to protect the perineum cushion application sponge cover. The temperature of the bath is too high: under normal circumstances sperm must be in 34 ℃ to 35 ℃ constant temperature environment in order to normal development, bath water temperature is too high often hidden “killing machine”. Such as sauna when the room temperature can be as high as 70 ℃ ~ 80 ℃, more than double the normal bathroom temperature, is not conducive to the growth of sperm, or cause “dead sperm” too much and infertility. The medical doctor learned from the causes of male infertility, part of the man is precisely because the testicular temperature is 2 to 3 degrees higher than normal, sperm can not be viable. So young people should be careful to take sauna baths, usually, the bath water temperature should also be in about 34 ℃ appropriate. Zinc deficiency less selenium diet: trace elements zinc can promote sperm motility, can prevent premature disintegration of sperm, and facilitate the combination with the egg, it can be seen that zinc has a significant impact on fertility. Selenium is also an indispensable trace element for the human body and comes almost entirely from food.