Why slow practice alone is not enough: recalibrating what “correct” feels like

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Direct answer: None of the studies cited here treat “slow practice alone” as a treatment for musician’s dystonia. Retraining methods reported in the literature—for example sensory motor retuning—are specifically designed exercises done under a therapist’s supervision, and the evidence comes mainly from small case series (Candia et al., 2002). In my case, a wrong movement done slowly is still wrong. What has to change is the brain’s reference for what counts as correct: fixing the mechanics is the cause, slow practice is the catalyst, and progress is the result.

Medical information in this article is sourced; the “Author’s experience” sections are my personal experience and understanding, not medical advice, and cannot replace a doctor’s diagnosis.

What is musician’s focal dystonia

Musician’s focal dystonia is a task-specific loss of voluntary motor control that appears in highly trained movements such as playing an instrument (Altenmüller & Jabusch, 2010). The DMRF describes it as a neurological disorder whose symptoms usually show up when playing an instrument and generally do not affect other activities (DMRF). NINDS classifies “musician’s dystonia” as a task-specific dystonia—one that appears only during certain repetitive movements (NINDS).

Experts estimate that about 1% of professional musicians are affected (DMRF). A research review notes that its pathophysiology is still not clear (Altenmüller & Jabusch, 2010); MedlinePlus notes that researchers think dystonia may involve parts of the brain that process muscle-contraction signals, and that there is currently no cure (MedlinePlus).

What “retraining” looks like in the research

Candia and colleagues’ 2002 study was a prospective case series of 11 professional musicians, with only an incidental comparison group—not a randomized controlled trial. During treatment, one or more fingers other than the dystonic finger(s) were immobilized with a splint so the affected finger could practice repetitive movements together with the free fingers; under therapist supervision, patients practiced 1.5 to 2.5 hours a day for 8 consecutive days, then practiced on their own for 1 hour a day for a year. Three wind players showed no clear improvement, while every pianist and guitarist improved clearly when performing repertoire without the splint (Candia et al., 2002).

The same team used magnetoencephalography in 2003 to measure 10 musicians who received this treatment and found that after effective treatment, the functional arrangement of the fingers in the somatosensory cortex changed: the finger representations on the affected side became closer to those on the less-affected side, and these physiological changes correlated with behavioral data (Candia et al., 2003).

Both studies had small samples. They do not prove the method works for everyone, and they are not a DIY home practice plan. The DMRF notes that the goal of treatment is to help the nervous system relearn specific movements without triggering dystonia; options include rehabilitation approaches, oral medications, and botulinum toxin injections by an experienced clinician, and there is currently no cure (DMRF).

Author’s experience: slow practice is not enough—recalibrate what counts as “correct”

It was not fixed in three weeks

To be clear up front: my relearning was not finished in three weeks. For roughly the first eight months I did aimless slow practice; only after I found a possible way to change things did progress speed up.

I say this because the idea that “slow practice will fix it” is easy to misunderstand. Slow practice is not useless—but for me, it was not the answer by itself.

Eight months of aimless slow practice

Those eight months were mostly me slowing the tempo down, without a clear standard to compare against. Looking back, the problem was not slow practice itself, but whether the slow practice had a reference.

Slow practice without a reference is like carefully measuring with a bent ruler: no matter how carefully you measure, the result is still bent. I believe that if I had had a reference from the start, the foundation stage could have been much shorter.

A wrong movement done slowly is still wrong

One problem I ran into myself, I call “computation mix-up.” It is like a car’s computer is broken: you only need 30% throttle, but the output is always wide open; you want half a turn of the wheel, but the torque goes past a full turn. Positioning is also misread. On the guitar, that shows up as loss of control over fretting pressure and fine movements.

As I understand it, slowing down in that state still uses the same broken ratios—just more slowly. So a wrong movement done slowly is still wrong. For how these three problems differ, see Fingers curling or extending without control.

What counts as “correct” has to be recalibrated

In my five-step model (see A 5-step breakdown of guitarist dystonia), after every note you compare the result with the target—that is calibration; then, whether the note was right or wrong, the result is stored and gradually becomes long-term movement memory.

So in my model, if the standard for “correct” is itself wrong, every calibration confirms the wrong thing once more. For example, if a finger locks and you finish a note by compensating, and you have already come to feel that as “normal,” then practicing it slowly a hundred times confirms it a hundred times.

For me, what actually drove progress was fixing the mechanics: finding again how the wrist, elbow, and fingers should apply force in a reasonable way, so I had a new, correct reference. The role of slow practice was to give me enough time and space, under that new reference, to feel and compare.

My four practice factors

I later broke the factors that affect practice into four:

  • Write speed: how fast I pick up something new;
  • Sensitivity: how sharp my body awareness is;
  • Heat handling: how long I can stay focused continuously;
  • Debugging ability: whether I can find where the real problem is.

I rate myself high on the first three—I learn new songs quickly, can often find why I cannot play something, and can focus for long stretches; the longest day I ever practiced was 16 hours—but low on debugging. As I understand it now, that combination is dangerous: learn fast, and you also write wrong things in fast; focus for long, and you also repeat the wrong things more. That is my own situation, not everyone’s cause—but it may help you think about which combination you are.

How the whole problem stacked up layer by layer is in How a pinky problem became dystonia.

Finding a reference: where you might start

I am not going to write practice steps. The research methods above were done under therapist supervision, and I do not recommend anyone copy them on their own. I only share a few directions I found useful: if you are just curious, start by filming yourself and looking at your movement; if you have a teacher, bring a specific question; if hand problems already affect daily life, book a doctor directly and bring your own videos and notes to ask a therapist or your treating physician.

Related video

This video covers why I think “blind slow practice” is not enough, and how I worked through the problem layer by layer.

Bilibili version (for readers in mainland China): 【Electric guitar left-hand loss of control】Why “blind slow practice” does not fix finger spasms? Focal dystonia: a 5-step troubleshooting outline

Author’s channels: YouTube（@kwokyinchoi7380）｜Bilibili（yooyoyoyoy）

When to see a neurologist

The DMRF notes that a neurologist trained in movement disorders (a movement disorder specialist) is usually the most appropriate clinician to diagnose and treat musician’s hand dystonia (DMRF). Diagnosis is generally based on physical and neurological examination, personal and family history, and tests that rule out similar conditions (NINDS).

Before the visit, I suggest preparing these points:

  • videos of playing when symptoms appear, and videos of the same hand doing other everyday actions;
  • whether symptoms appear only when playing, or also in daily life;
  • whether symptoms are clearer when you are stressed or tired—NINDS notes that early symptoms may only be obvious then (NINDS);
  • whether anyone in the family has dystonia, because clinicians use personal and family history (NINDS).

FAQ

So is slow practice useless?

No. For me, slow practice is the catalyst—it creates conditions for change; but without a correct reference, slow practice only makes the wrong movement more stable. That is my personal experience, not a research conclusion.

What do I mean by a “reference”?

As I understand it, it is the reference you use to judge whether “this note was played correctly.” If the reference is wrong, calibration keeps adjusting in the wrong direction.

How long until it gets better?

I cannot give you a timeline, and I cannot promise it will get better. The DMRF notes that there is currently no cure for musician’s dystonia, but there are multiple treatment options (DMRF). On my own, aimless slow practice alone took about eight months before I found a direction. Everyone’s situation is different—please assess this with a doctor or therapist.

Sources

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