As a pianist, everything about that seems wrongheaded and a great way to get RSI. Piano rules are basically don't move your fingers if you can move your hand, don't move your hand if you can move your wrist, don't move your wrist if you can move your forearm, don't move your forearm if you can move your body.
The point isn't to exaggerate that and be strict with it, but it is to limit strain. Even when typing at a desk, I keep the heels of my hands in the air.
The point isn't to exaggerate that and be strict with it, but it is to limit strain. Even when typing at a desk, I keep the heels of my hands in the air.