Lately, I've devoted some of my practicing to developing and strengthening the weaker fingers, and I'm just curious about if anyone else spends time with this and if you have some useful excercises that you'd like to share. I have a few
Just because the 4th and 5th finger may appear as "weak" it doesn't mean the solution is making them "strong" for they can't really become strong. And the three last phalanges of the 4th and 5th fingers there are no muscles while the interosseus doesn't really help in overcoming the natural lack of dependence and control of the 4th and 5th. Gaining real independence in these fingers is just an illusion as are exercises whose aim is independence
Nor will help you the "strength" of the flexors and extensors muscles since as shown by resonances piano playing is not a stimulus strong enough to cause hypertrophy of these muscles.
What is left is the conclusion that speed, control and accuracy are all extra-physiological aspects of piano playing. The proof of the pudding is that if you take a pianist who lacks control of the 4th and 5th finger, who lack speed and who lacks accuracy and observe his physiology and then observe him again after 6 months when he has gained lot of control of the "weak" fingers, accuracy and speed ... no kind of physiological difference will ever be observed. Unlike a sport athlete which will show physiological differences from a stage to another
As a matter of fact the fingers are already as fast as they can (the motion being very limited and the muscles already controlling it efficiently)
The problem with speed at the piano is not gaining speed but "maintaning" speed
What we train is neither muscular strength or muscular power (nor efficient oxidation of fuel like a runner does) We train the best way not to sabotage ourselves
When piano students or even teachers talk about finger weakness, speed, tension, control or whatever they are at a loss at finding rational ways to explain te "sources"
Anatomically and physiologically the sources of such "aspects" are very specific and very few
On explanations given by students and teachers it sounds as if there were some kind of "esoteric" souces. This is especially true of "fatigue" which is a specific physiological mechanism but which is always explained as if it was metaphysical
By not sabotaging ourselves I mean that we have to train our neurological system not to use contrasting movements or opposite set of muscles when performing a repeated series of movements. All the exercises in the world will never train physically our hands what they do is training your neurological pathways. Hitting the right note with the best precision and accuracy, playing a fast scale pattern without accumulating tension, moving the 5th finger with precision ... none of these aspect can really be linked to a physical mechanism at work, to a physical/physiological transformation or to a physical training.
Speed is the delay between contraction and release (lont-term contracted muscles hugely limit speed) and besides any muscle contraction after a key has been depressed is just an incredible wast of energy. Of course in a slow piece you have all the time to play a chord, released, contract as you play the next chord, release, contract as you play a scale, release
How do you do this on a 1/4 = 140 piece? That's the point the release after a contraction must be very very rapid (one fraction of millisecond) and so must be the next contraction
This is what speed is all about
Control over the 4th and 5th finger (which give the illusion of more strength too) works by the same principle. Fast release of contraction aimed to the other fingers and contraction and weight transmitted to the individual fingers. You know that you're gaining such control when you can keep all the fingers in the keyboard and with the least amount possible of "finger-lifting" (the true lifting should come from the forearms) you can just depress 4th and 5th fingers without depressing the other fingers too. Try to do this after you have accumulate contractile tension for a while and you'll see it's impossible without first consciously releasing all that has been accumulated
This is the real key to 4th and 5th finger control not "working-out"