High scrotal temperatures and chairs in the pathophysiology of poor semen quality

Statistically highly significant increase up to 3 °C was recorded when subjects were sitting on commonly used chairs already in 20 min. When the subjects were sitting on the saddle chair no increase of scrotal skin temperature or humidity was observed indicating good ventilation due to open hip and knee angles. Body mass index correlated with the scrotal skin temperature, when the subjects were sitting on the conventional cushioned office chair, but not when sitting on the saddle chair. Chairs which increase the scrotal temperature may have contributed to the decrease of semen quality and quantity reported during the last decades in sedentary societies.