Purposeful Movement: The "Rubber Wrist" [Video]
I recently came across the idea of the “rubber wrist” in the left hand—the premise being that the wrist shouldn’t be rigid if we want to maintain a secure hand position. This was demonstrated with some loose, exploratory movement.
We can build on this exercise by looking at the root of why this freedom is so helpful. Understanding these mechanics helps us find the exact boundaries of that movement, allowing us to transition from an intuitive exploration to a precise, intentional practice where we know exactly what physical feedback we are looking for.
Why a Free Wrist Matters
A flexible wrist is essential because it allows the weight of the hand and arm to shift naturally. Instead of squeezing or pressing, we can allow gravity to do the work by using quiet micro-adjustments throughout the entire arm to channel its weight directly down into each finger. In fast passages, this fluid release is what lets us transfer that weight seamlessly from one note to the next.
"Ultimately, speed is not about forcing your fingers to move faster; it is about how quickly you can transfer weight between them."
Try this: The Two-Note Weight Shift
Play only two notes at a time, very slowly.
As you transition, focus on feeling the weight shift across your knuckles.
Let the second note sit "heavy," acting as a stable, grounded destination.
Then, move to the third, letting the weight flow forward to make that note just as heavy.
In the following video, I use a passage from Rimsky-Korsakov’s Scheherazade to show how this works. You’ll see that even while I’m experimenting with what to “relax,” the movement remains quite precise and quiet. I’m simply trying to help gravity do its job.
Ultimately, speed is not about forcing your fingers to move faster; it is about how quickly you can transfer weight between them. Learning to indulge in the feeling of this weight shift at a luxuriously slow tempo is what makes fast passages clean.
As you do this, you will discover how little movement is actually required. The nervous system learns by mapping physical feedback, and it thrives on quiet, precise signals. Reducing any extraneous wriggling also minimizes background noise that drowns out the very subtle movement you are trying to learn.
This is why the more we can narrow down exactly what we are looking for whenever we practice, the more fruitful our work becomes. When we aim for true precision stemming from a first-principles understanding of physical mechanics and neuroscience, we transform our practice from an initial exploration into deep, efficient learning.