Run an asthma medication called Montelukast (Singular) at 20 mg about 30-45 mins before training.

Tren causes prostegladins responsible for constrictions of the tiny structures of the lung to be released. This medication blocks those prostegladins from working and the structures of the lung from being constricted...so your cardio ends up not being messed up.

Trust me, it works very well and makes it almost like you are not impaired by tren. You might have to go to 30 mg or even 40 mg to get the full effect but 20 mg works decently well.

Be careful, this medication has been black listed by the FDA for worsening mental health of depressives and linked to suicidal thoughts at high doses.