Image The posture of the pianist

1.Sit deeply at the chair.And make a muscle along the spine straight. 2.Draw keyboard near your body. 3.Elbows angle must be right_angled(The weight of your arms tired yourself). 4.Make your fingers round like having a egg. 5.If possible,it's better not to put your arms on the desk. Image pianist. Pianist is always playing a piano without loading down anywhere with the arm. If you get tired,you shoud put something under your arms.