Hello, So i have been asking several people and all say my tremolo picking technique is really good. But the problem is that after a short time i reach fatigue. I play from the wrist but i feel stress in the forearm and arm, it becomes uncomfortable and eventually i need to somehow relax my arm while continuing playing and it causes me to change the position of the pick in my hands to be more inwardly angled and thus i fail with riffs and songs and cant play consistently.
Also, another question, whenever i try to practice with mentronom tremolo picking, lets say 60 bpm, should i do d/u/d/u as a 4 notes for every beat? or every beat = one strum either down or up?