I agree, you wont find a source for that, however you will find the opposite.
Retana-Marquez S, Bonilla-Jaime H, Vazquez-Palacios G, Martinez-Garcia R, Velazquez-Moctezuma J. Changes in masculine sexual behavior, corticosterone and testosterone in response to acute and chronic stress in male rats. Horm Behav. 2003 Nov;44(4):327-37.
"Additionally, we evaluated the effect of testosterone treatment on the effects of stress on sexual behavior. Sexually experienced male rats were exposed to one of the following stressors: immobilization (IMB), electric foot shocks (EFS) or immersion in cold water (ICW)."
"Associated with these effects, testosterone decreased in the EFS and ICW groups on days 1, 15, and 20. However, corticosterone increased only in males exposed to ICW"
summary, increased cortisol, decreased testosterone.
A cold shower is definately not what you want after a workout, it will cause vasoconstriction, which will impede nutrient delivery. Also, hot showers help the secretion of growth hormone. Please ensure you are well informed before making scientific claims. |