The 5 Principles of Tai Chi

The 5 principles as taught by Ben Lo.

1. Relax
2. Separate empty and full
3. The waist is the commander
4. The body upright - the head is suspended
5. Fair Lady's Hands

Arthur Rubinstein shows ideal sitting posture at the piano. Head upright. Not hunched over. Looking down the nose to the keyboard.

I also find practicing sitted Tai Chi helpful when applying it to the piano.