>>76496389
>The pain
Are you referring to the aching sensation you get in the target muscle during an exercise? Or do you mean the "oh shit that's not supposed to happen" pain?
Farmer carries done with two hands will be primarily a forearm/trap exercise. Your hands/forearms will need to grip the weights tight, while the traps will be working to keep your shoulders up.
I've been doing them with one DB recently. I do this so my core is more challenged.
As
>>76495903 mentioned.