Ditto about DMAA and working out. It's exactly like the OP Renz Envy sez, there's almost no pain in the workout and you can grind way harder than usual.
I have PEA (phenethylamine), hordenine, and DMAA combined in capsules, which I created from bulk powders of each. I read about this stack on a body building forum. Basically it works like this:
PEA - naturally occurring chemical that gives strong and clear energy lift without caffeine jitters
hordenine - MAO-B inhibitor (necessary for making PEA active!!!!! Doesn't have to be hordenine, there are others...) Also a bit of a stimulant itself.
DMAA - you're already in that thread so I won't carry on.
My ratio is about like this: 8:2:1 so for example a capsule might contain 400mg PEA, 100mg hordenine, 50mg DMAA. This is a good workout stack. It's also pretty amazing to have a cap sitting by your bed and to take it on an empty stomach when you wake up. Before long you're pumped to get out of bed and get your day going, HOWEVER my experience is that I crash pretty fast. Like, this morning I took the stack capsule and it was effing brilliant as always for about 15 minutes while I was making coffee and breakfast, but by the time I was half way through eating my hot cereal and having had one cup of coffee, I wanted to crawl back into bed and sleep. This is not the desire effect.
I've read reports from others saying that PEA lasts a few hours for them. Huh... Not sure what I'm doing wrong. And Renz Envy sez the effects of just the DMAA lasted a couple hours. I'm not a stimulant abuser so this isn't a tolerance issue, I guess maybe I just don't respond well to stims. But on the 2 or 3 occasions when I have gone for a workout right after taking DMAA alone or in the stack with PEA and hordenine, it was magic. I just have to be careful not to overdo the workout; I'm 55 and not in great shape, so too much of a good thing leads to a lot of a bad thing, like nausea, muscle pain, headache, high blood pressure, and maladaptive earlobe syndrome.