Ephedra and Cardio question

[SURFTEXAS]

Is it bad to do my cardio workouts while taking an ECA stack? I mostly just run or do sprints, but I dont know if the combination of the ECA and the cardio will be too much. Should I not take the stack or atleast cut back on my dosage on cardio days? Thanks.

 

[Ceebs]

Depends on how high your heart rate gets. Do these activities already put you working between 70-80% of your max heart rate without drugs? If so, I wouldn't recommend adding ECA or NYC to the mix. Especially if you're doing something as high intensity as sprints.

 

[SURFTEXAS]

In the past I had always done my cardio with my target HR around 70-80% without the ECA, so that makes sense that it could be too much with it. If I skip a day on the Ephedra, will it still affect my HR the following day when I do cardio? How long does it stay in my system? If nothing else I can just monitor my HR to make sure Im not overtraining during the cardio.