Since I’m a wrist picker, the forearm muscles are used in my picking motion. So it’s not an issue of unrelated muscle movement. It’s seems to be more of an issue of muscle fatigue. After a long practice session at very low speeds, I’ll eventually feel the fatigue/tension in my forearm. When I push myself and play fast, I get the fatigue/tension sooner. It all depends on how fast I’m going or for how long.
As my forearm gets tired, my picking gets clunkier and I have trouble pushing the pick through the string. I tried changing my pick angle but it doesn’t seem to help much. When the picking gets clunkier, my wrist/forearm work harder and the fatigue ramps up like a feedback loop. More fatigue gets more clunkier, more clunkier makes it more fatigued…until I have to stop and shake it off. Then I can resume playing again until my arm gets tired again. I tried loosening my grip on my pick to the point where it gets pushed back and forth by the strings to no avail. The fatigue still kicks in.
Is this just a muscle endurance thing that I should push like a long distance runner? I pick at my speed limit as long as I can (until it gets clunky), relax a bit, then repeat. The goal here would be to extend how long it takes for my arm to get fatigued by building endurance in the forearm muscle. Once my endurance has increased, I increase my speed to the point where fatigue sets in (and clunkiness) and push through it again until the fatigue goes down, then increase speed again. This way I build up speed and endurance.
Or, should I back off on my speed by say 30% until I can play tension/fatigue free as long as I want and slowly ramp up my speed? All the while, I keep my speed low enough so I avoid tension/fatigue in my arm and any potential damage it can cause.
I was wondering if anyone here had to deal with similar fatigue/tension issues and how they dealt with it. So far, there doesn’t seem to be any pain in my arm, just fatigue and soreness like after a day of rock climbing.