Are you maintaining a correct posture at the piano?
Remember that a posture which is not correct will sabotage relaxation at the piano
The distance from the piano should be such that whwen playing in the centrla rnge of the white keys youe elbows should be free to move in front of you, almost touching each other
If the sides of your body are not allowing them to move or touch move back till they can
Aproximately there should be about the size of a fist between your elbows and you body
Once found the correct distance you must find the correct height
Remember that you upper arms should just hand in a RELAXED manner from your shoulder
With your upper arm hanging you should just lift the forearms and place them on the white keys in the playing position.
Ask someone to observe you because if you're at the right height:
1) The forearm when playing position should be parallel to the floor
2) The hand, wrist and forearm should be in a straight like
3) The elbow should be level with plane of the top of the white keys
4) There should be an arch below your hand and wrist
If you sit the wrong distance and height you compensate by slouching, back sitting and raising your shoulders. If you do any of these is impossible to maintain a muscle relaxation
The arch of the hand is a condition you should almost never deviate
The wrist is able to work as a weight trasmittion device only when it is in a straight line with the hand and forearm. When it is not it is collapsed.
A collapsed wrist instead of trasmitting the weight from the torso to the hand "accumulate" this impulse on the valley forming between the hand and the forearm causing tension
Playing depends a lot on gravity and must of the playing comes frm the action of gravity alone. The component of tensionless playing are:
1) small relaxed lifting of the forearm maintaining the natural relaxed arch of the hand and wrist. This playing share allows you to trasmit the weight properly
2) small and short muscle contraction the moment the fingers land on the keys
3) immediate release of the contraction a fraction of second after the contraction resulted
The biggest cause of injury if "static muscular activity" or "co-contraction"
In order NOT TO ACCUMULATE TENSION the "shortened" muscles (the contracted ones) must be released and lenghtened before a new pair of muscle is contracted
If you failt to do this i.e. contract one muscle/ without releasing the previously contracted one you create a co-contraction and tension builds up
Contraction without release is a "static muscular activity" because all the muscles are constantly shortened; so their condition is static
Contraction and release, contraction and release, contraction and release is instead a "dynamic muscular activity" because the condition of the muscle is dinamically changing all the time. When you're using a "dynamic muscular activity" you CAN'T accumulate tension and by turn can't injury or tire your hands
What contraction does is trasmitting the weight from your torso up to the shoulder blade, upper arm, forearm, wrist and hand. What release does is sending back the weight to the torso. Think of your "playing apparatus" as a street which the impulse of weight travel back and forth all the time. Think of your wrist as the bridge this impulse travels in
If your playing apparatus is not alignment (i.e. collapsed bridge of the wrist) the impulse can't travel quickly and get accumulated somewhere
There are certain ways you can re-train your hands to automatically play with a dynamic muscular activity
1) Train everyday the three aspect of playing. Gravity action over a relaxed forearm. Alignment of the hand, wrist and forearm. Contraction at the moment of impact. Release of the contracted muscles a fraction of second after the contraction occured
2) Play all your piece in very short sections. Make a patchwork.
For example: play three bars and stop. Play the next three bars and stop. Next three bars and stop. This way you can't possibly accumulate tension because the moment you stop you release any kind of accumulated tension or unreleased contraction
If you practice a piece you already know and have tension problems with in this way you will train your hand to recognize the need for "releasing the tension and contraction" in those same parts you stopped at
3) Practice the tensionless falling, contraction and released of the playing apparatus on just the "main beats" of the piece.
The big muscles of the arm are trained to arrive in
different locations on the keyboard very precisely on beats and in a relaxed manner (relaxation coming naturally from not having to thnk about all the intermediate notes and subdivision) and they will carry the fingers to those places pretty much effortlessly as the subdivisions are filled in. In this way tension in difficult passages is never allowed to
develop.


Another problem is abduction
Abduction mean that you play in a way that the alignment doesn't occur with the radio bone but with the ulna bone. But the ulna is a tiny bone that doesn't even connect to the hand and doesn't trasmit weight
Abduction occurs when you play with the whole side of the thumb instead of the tip of the thumb. For the alignment to occur at the radio your pinky should be parallel to the white key and in this position the thumb is oblique to the white key and can only play on the tip
You're abducting when the thumb instead is parallel with the white key (hence you're playing the the side of the thumb not the tip) and when the pinky is not parallel to the white key but oblique toward North-East