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@ Parman - Activate OP_GFY now!!
2025-05-06 04:45:08
A little something for #PianoStr.
On efficient technique and the rotation fallacy...
Playing piano with rotation can deceive people to play with very poor form. Do not roll over the contact point when depressing the keys. When focussing on rotation, this is what people end up doing and it's wrong.
Like when doing a push up with fists, you do not make your body rock back and forth, rolling the knuckes on the ground.
The movement is in and out. Also analogous to shifting position when dancing on slippery gravel, you don't want to roll over your ankle when changing direction. If you slide left, you push with your right foot, but the ankle doesn't roll. Your leg bends, then expands to push you the other way. Getting the lines of force is crucial to not fall, but easy for the body because it has balance (vestibular system, inner ear). For the hand you must keep it balanced which is hard as the hand doesn't have it's own balance system.
Rolling over the contact point causes your momentum to continue in the initial direction, and you waste time and accuracy trying to bring it back. If you did that when walking/dancing/skating, you'd fall over.