If you play big chords that fast and that loud, it's less effort to let the hands come up after each chord than keeping them down.
To play devils advocate: on the other extreme there are pianists who seem to have a total physical disconnect with the music. Instead of hand waving they approach the piano as if nothing special was going to happen, play as if they were filling out their tax return, and finish as if the only thing on their mind is to get away from the piano and do something else
I have always been curious why certain pianists seem to lift their hands as high above the keyboard as they can whenever there is an opportunity. It almost looks like they are trying to wave to or catch the attention of somebody in front of them.Example (I didn't like the performance but I picked it for his hand movements, which are not as extensive as some I have seen but still...):If you engage in this behaviour, I am very curious to hear why . Or if you don't but know/have an idea about the reasons for it, post ahead!Personally I find it quite bizarre. It doesn't add anything to the performance, it looks ridicolous, it increases the chances of hitting the wrong keys, and to me I can imagine that it makes the performance worse by putting some of your focus away from the keyboard into aspects that doesn't have anything to do with the musicality of the piece. If you handle the technique well, shouldn't all your efforts go into making the performance as musical as possible?
When I was younger I flew all over the keyboard I still laugh when I see videos of myself playing back then. Now I am quite boring and hardly move at all. I feel it from within rather than from the hands, unnecessary movements are silly and only make us think that we are creating the music. Some people like to conduct their music physically with their mannerisms, facial gestures big arm movements what have you. To me it is music playing you not you playing the music. Some people do over exaggerated gestures as an entertainment quirk to their presentation, it is done on purpose, some of us know some famous concert pianists who are like this and some of us even get very irritated by it. However I know for example of one performer who can't control themselves due to illness and make all sorts of funny sounds and talking and breathing while playing sometimes louder than the music itself! People remember him because of it more so than other performers, I guess doing lavish gestures while you play tries to attract your audiences attention, personally I think if you talk to your audience (before playing!) this is better "bait" to reel them over to your side with.
Who cares anyway if somebody does funny faces or dances the mambo while playing piano. The only thing that (should) matter is the sound he manages to get out of the piano.
well, making hand gestures help you to communicate with the audience and helps you to feel the music and get into it.
Maybe even you are subconsciously doing it. On some rare occasions I'm like that.
well if you are playing very loud chords then of course you would lift your arms to get the maximum effect and volume possible.
No, you wouldn't. Coming down from a height onto the keys creates a harsh, ugly sound, as well as interfere with your accuracy. What creates volume? It isn't how hard you hit the keys, it's the speed of the hammer. When Horowitz produced his tremendous fortissimos, you wouldn't actually see him do anything. The force came from his back and went directly through his arms into the fingers and into the keys. This is how you create volume without banging.Remember, up and down motion slows you down, and wastes energy. NOTHING you do up in the air over the keyboard has any effect on what comes out!