Testosterone in moderate dosages ( below 500mg/week) will improve your endurance, since it increases your red blood cell count, thus improves your body´s ability to use oxygen.
While on test, I never get tired doing cardio and running seems so easy, it´s almost fun.
Most of the non-aromatizers should be alright. Just like gainer said test should be fine too as long as your not taking a ton. You want to stay away from things like dbol and anadrol because they can make you bloat, and also create pumps that would stop you from doing cardio.
I have run for a long time on and off and am in good shape. Sust and deca have not negatively affected my endurance - the only thing that has is my huge increase in bodyweight.
But I think it is true that Winny might cause legs to cramp up during cardio as it just happened to me during 2nd week of winny so effectively that could limit the type of cardio/endurance work you could do in the first place!