I’ve never understood the trackball from an ergonomics standpoint.
I use an ergonomic mouse, so when I go from using my mouse to relaxing every muscle in my arm and hand, nothing moves. When using a trackball, I have to fold my thumb out of the way or otherwise move my hand when I go from relaxed to usage mode. If I don’t do that, my thumb naturally rests on the trackball and can cause involuntary movements.
Also, over time, my thumb gets tired - the muscles in my arm that I use to move a traditional mouse are much bigger and can be used for longer without tiring, which isn’t the case for the tiny muscles around my thumb.
I’ve never understood the trackball from an ergonomics standpoint.
I use an ergonomic mouse, so when I go from using my mouse to relaxing every muscle in my arm and hand, nothing moves. When using a trackball, I have to fold my thumb out of the way or otherwise move my hand when I go from relaxed to usage mode. If I don’t do that, my thumb naturally rests on the trackball and can cause involuntary movements.
Also, over time, my thumb gets tired - the muscles in my arm that I use to move a traditional mouse are much bigger and can be used for longer without tiring, which isn’t the case for the tiny muscles around my thumb.
What am I missing?
I think you’re right about the “use big muscle groups for repetitive actions instead of small muscle groups” idea. That’s probably better overall.
I don’t think I’ve encountered that thumb problem you describe, though.