Dopamine dominant individuals (not only using the Braverman assessment because dopamine dominance with the Braverman could indicate a nor-adrenaline dominance) in the extreme majority of cases cannot tolerate volume.
Understand that being dopamine dominant means that your RECEPTORS are super sensitive to the action of dopamine. Just like when you are insulin sensitive your cells respond strongly to insulin.
When your cells respond strongly to something YOU DO NOT NEED TO PRODUCE A LOT OF IT. Why? Because even a small amount does the job.
So dopamine dominant individuals have a LOW baseline level of dopamine at rest (if dopamine was high at rest they would be out of control all the time) and are not equipped to produce a lot of it (because they don’t need it).
The main reason why they cannot tolerate volume is that when they are training hard they produce both dopamine and adrenaline. Now, adrenaline IS MADE FROM DOPAMINE. The more adrenaline you produce, the more you deplete your dopamine. If you do not have a lot of dopamine (because you normally don’t need it because you are super sensitive to it) and you do a lot of volume and/or take short rest intervals you will produce a lot of adrenaline, which will deplete your dopamine. Dopamine depletion is what we often call (rightly or not) “CNS fatigue”. You feel lazy, unmotivated, mood swings, lethargic, almost depressive. Have a dopamine dominant person do too much volume and they will feel like that… dopamine depletion.
THERE ARE EXCEPTIONS. You do have individuals who are dopamine dominant (sensitive) AND have a high baseline level of dopamine. These guys are crazy!!! Can’t stay in place, hyperactive, competitive to a fault, extremely vocal, often getting into fights, sex addicts, etc. Like a manic period for a bipolar person. These guys CAN do a lot of volume of heavy work. BECAUSE THEY PRODUCE A LOT OF DOPAMINE so even if they do a lot of volume, pumping out adrenaline they have the dopamine to support it.
But these are the exceptions. I’m training one such guy at the moment, a member of the Canadian national bobsleigh team. Guys is crazy, 300kg deadlift, 280kg squat, 230kg front squat, 42" vertical, 1.39/10m, 3.50/30m AND he can do lots of volume. THIS IS A GENETIC EXCEPTION.
One place I disagree with Charles is that for him a FIRE type (Type 1A in my classification) is build for strength (that’s true) and can do a lot of volume of heavy work (not true for most of them). That’s because Charles used Adam Nelson as his prototype 1A. Adam is like my bobsleigh guy, one of the rare Type 1 to also have high dopamine. These are the exceptions! The normal Type 1 has low dopamine and a high sensitivity so they can lift heavy, they can lift often, but they can’t do volume.
Type 1B can do a bit more volume because acetylcholine decreases the need to produce adrenaline (it shares some of the same functions); if you produce less adrenaline as a type 1, you can train more. But it still less volume than the other types.