does cardio decrease testostrone levels?

[John Smeton]

could too much cardio?

also if one does 15 minutes high intensity cardio twice a day
does that?

 

[KoolKat]

yes it does

 

[DieTrying]

The intensity generally dictates how the body responds. HIIT is very similiar to resistance training in that if it is done too long, increased cortisol becomes an issue.

Plasma testosterone and catecholamine responses to physical exercise of different intensities in men.

Jezova D, Vigas M, Tatar P, Kvetnansky R, Nazar K, Kaciuba-Uscilko H, Kozlowski S.

Plasma testosterone, noradrenaline, and adrenaline concentrations during three bicycle ergometer tests of the same total work output (2160 J X kg-1) but different intensity and duration were measured in healthy male subjects. Tests A and B consisted of three consecutive exercise bouts, lasting 6 min each, of either increasing (1.5, 2.0, 2.5 W X kg-1) or constant (2.0, 2.0, 2.0 W X kg-1) work loads, respectively. In test C the subjects performed two exercise bouts each lasting 4.5 min, with work loads of 4.0 W X kg-1. All the exercise bouts were separated by 1-min periods of rest. Exercise B of constant low intensity resulted only in a small increase in plasma noradrenaline concentration. Exercise A of graded intensity caused an increase in both catecholamine levels, whereas, during the most intensive exercise C, significant elevations in plasma noradrenaline, adrenaline and testosterone concentrations occurred. A significant positive correlation was obtained between the mean value of plasma testosterone and that of adrenaline as well as noradrenaline during exercise. It is concluded that both plasma testosterone and catecholamine responses to physical effort depend more on work intensity than on work duration or total work output.

 

[charliewat]

I think that cardio is getting a bad rap around here. Most athletes gets all kinds of high intensity cardio all the time and can get as big as anyone

 

[DieTrying]

I just think there are a lot of factors that go into the equation. I hate to make blanket statements like "cardio decreases test" when there are so many variables that goes into the amount of testosterone that one's body produces.

Maybe if the question was a little more specific it'd be easy to tackle.