Another problem with fabled
"repetitive strain injuries" is not only what we are doing
wrong but, what we are not doing right. Not only are there movements
which hinder playing but there are movements which augment it.
Some pianists develop thumb problems.
Often they are taught to cross the thumb under the palm which is bad
for many reasons and they are also taught to play the thumb straight
down which cripples the effortlessness of the rest of the fingers.
The hand requires balance and that can not be achieved if we isolate
fingers.
The muscle that plays the thumb
straight down is the thumb's abductor. Abductor muscles are rather
weak and sluggish and fatigue quickly. The thumb's strongest muscle
is its flexor which pulls the thumb under the palm. Your thumbs are
designed for gripping and holding. But the keys to the piano are
not in the palm, they are under it. Crossing under then down uses
two muscles at the same time and creates a dual pull of the thumb's
bone. In this vector force tug of war between two muscles, strain
can occur and certainly uneven playing. In addition, the thumb's
tendon and the forefinger tendon intersect. When you cross the thumb
under and flex the forefinger, the two tendons grind together.
Friction of a tendon is not good. Eventually the pianist may develop
thumb problems. Instead of playing the thumb's abductor straight
down, there are other movements which can give it effortlessness and
power. I'll cover how to get the thumb over (and not under) for
scales and arpeggios later.
The first movement is to simply let
gravity play the thumb down. Lift your arm up then let if gently
fall to the key and depress it (without pressing into the key bed).
As you can feel, gravity, or the weight of the arm is very powerful
and effortless. Often pianists complain that the action of some
pianos are stiff. They are not. The pianist is just trying to play
using the wrong or weakest muscles. While depressing a key using
gravity, notice you did not use any muscle of the thumb at all.
Another motion is to use your pronator and supinator muscle which are
located around your elbow. From your elbow, rotate your hand from the
elbow, left and right. Notice how fast and effortless you can move
your thumb without using it. Make sure your wrist is straight. Now,
from your shoulder and elbow, forward shift into a key with your
thumb, like poking someone's eye. Again, you don't use any thumb
muscle but only arm muscle. The elbow, or pronator and supinator
muscles, is where trills and tremolos come from, not the fingers or
hand. The pianist who attempts to play them from the fingers (which
have no muscles) or hand will quickly experience fatigue, cramps or
pain.
You now have three ways to use the
thumb to depress a key without using the thumb's muscles at all.
Combine all three then minimize them and you will be on your way to
effortless playing. Eight fingers to go.