Effect of steroids on sports endurance?

[Roidbeginner]

I heard that certain steroids affect the endurance of sportsmen. I have noticed a decrease in stamina in running when on dianabol or durabolin. I wonder if you guys also notice such effects from similar or other steroids?

I'm keen to try a Test?Dura cycle while continuing my boxing training, I wonder which steroids should i avoid?

what steroids benefit a boxing regimen?

[Loaded61]

I guess its different from each person i found a increase of stamina in d-bol and a huge increase on anavar not to mention i got faster...and football is my sport of choice what do you play?

[Valac]

tren reduces cardio endurance significantly, puffed walkin up stairs. :P