Personally, no. 500mg/w enan and I was still able to bang out 45 mins on the tredmill and 1 hour (intense, 80%+ HR) racquette ball sessions.

And though my handle is slightly unique/odd, you still managed to butcher it

Yes, I did. What is up the the oe? DougoeFre5h.....hrmmm...I have a hard time with words that I fail to pronounce.

What is your treadmill routine like? HIIT or constant? What kind of incline and mph are we talking about?

I get a 65% HR with maybe, 4mph and 1-2 incline for 45 mins...now it takes like 20 to get there with that setting so I might do some jogging to get the heart pumping. The key in this case (fat loss) is to do cardio that you could have a conversation while doing.

Tren kills my stamina, i lose my breath much faster... I'm at 800mg/week right now, and i lose my breath running around the bases in my baseball games.