Perhaps "intense" is a better word for "weighted". It's not so much a case of physical weight than of the feeling of a full and powerful sound, even when playing piano. If you have a clear imagination of the sound, the hands and fingers will find a way to produce that sound.
someone commented that when i played the slow and soft movements/pieces, it doesn't sound nice coz it is not "weighted" enough, or something like that.. how do i put more "weight" on my fingers ? really need help..thanks.
When your hand is over the keyboard without playing a note, you put a finger on a key and let your arm drop, so that the finger is now supporting the weight of your arm instead of the shoulder muscle holding your arm up.
You mostly don't play with full arm weight, but that is the general principle of playing with arm weight. You can vary how much weight is on each finger with varying degrees of using the shoulder muscle to hold the arm up partially, or let go with full weight.
Although there are still those that believe that weight is just an illusion the proof is on the pudding.
You can easily measure the weight of the arm - if all muscles of the arm are relaxed. So this weight or let's say the mass of the arm is a fix value, which cannot change in a short time (minutes, hours, days...)
Nicco is completely right. What we feel as "weight", is the more or less taut muscles of the upper arm: the more taut the muscles are, the lighter feels the forearm.
If they are totally relaxed, the arm has its full, real weight, and that's way too much to play a piece, if it's not for example the beginning of Tschaikowsky concerto.CORRECTIONIt's too heavy even for Tschaikowsky concerto.
In fact anatomically it's not the forearm or upper arm muscles that allows the arms to remain up and not to fall at the sides of the body but the clavicular pectoralis major
You lift your forearms with your chest muscles? That's interesting! How should that work?
Are you sure, this image is correct?I don't hope, you play piano in that postion
Sorry, this makes anatomically no sense. The muscles of the chest will not have any influence on the forearm, whatever they do, contract or relax. They have an influence on the motion and position of the upper arm, that's clear.