The three zones, and why only one of them builds speed

Every technical block you play sits in one of three zones. They feel different, they do different jobs, and the most common way to waste an hour of practice is to spend all of it in the one that feels best.

Comfort

The tempo and material at which your execution is perfect. Nothing slips, nothing feels risky, everything sounds good.

This zone is for grooving in a correct motion and settling in physically at the start of a block, or for re-finding a pattern after a break. That is all it is for. It feels productive because it sounds good, which is exactly the trap: playing things you can already play does not build speed, and no quantity of comfort-zone repetition will move your ceiling.

Get a few clean reps to confirm the motion is right, then leave.

Edge of ability

The tempo at which things fall apart a little. Not chaos, just a few slips appearing.

This is the problem-solving zone, and it is where the actual work happens. Find it by nudging up from comfort in small steps until small mistakes start to show. Then stay there.

The important part is what you do once you are there. The point is not to repeat the passage and hope it settles. The point is to fix one identified problem at a time: hand synchronisation, one specific string transition, tension in the picking wrist. If you cannot name the thing you are fixing, you are not working at the edge of ability, you are just playing something slightly too fast.

If mistakes become constant and unmanageable, you overshot. Drop back toward comfort and climb again.

Speed burst

Well above your clean tempo, five to seven notes, relaxation prioritised over accuracy.

This one takes some getting used to, because it looks like bad practice. You are deliberately playing something you cannot play cleanly, and you are not trying to clean it up. The goal is exposure to the fast motion, which as I have argued elsewhere is often a genuinely different movement from the slow one rather than a sped-up version of it.

Keep it short. Five to seven notes, no more. Do not chase note count and do not chase a clean take.

There is one stop condition worth taking seriously. If the same flub recurs in the same spot rep after rep, that is a mechanic problem, not a speed problem. Pull the material back to edge-of-ability work, find the actual mechanical fault, fix it, then return to bursts. Different, random flubs each time are fine and expected. Same flub, same spot, every time means you are grinding a broken pattern, and repetition will only make it more automatic.

That distinction is worth naming explicitly, because it is the difference between the two kinds of mistakes you can make at speed:

	What it looks like	What to do
Exploration error	A new, random miss each rep	Expected. Keep going.
Reinforcement error	The same failure in the same place	Stop immediately. Fix the mechanic.

Where ratio training sits

Ratio training folds edge-of-ability work and speed bursts into a single drill, which is why it earns its place as the app's main mode.

You fix the BPM at your edge-of-ability tempo, then alternate a coarse subdivision with a fine one against that unchanging pulse. The slow pass resets the motion and gives you a moment to release tension. The fast pass is the burst. The pulse never moves, so you always know exactly where the beat is, and any drift in the fast pass is immediately audible against a reference that did not shift.

The procedure that works:

1. Pick a fixed BPM, your edge-of-ability tempo for the material.
2. Start with two beats per rep on each subdivision.
3. Use a count-in before the first rep, so round one is not a guess.
4. Once the pattern is stable at two beats, add beats before you add BPM. Go two to four, then further.

That last step is the one people skip. The instinct after a good session is to raise the tempo. Extending the length of the fast pass at the same tempo is harder, more useful, and much less likely to reintroduce the tension you just spent twenty minutes removing.

The session shape this implies

Open in comfort for a few reps to find the motion. Spend the bulk of the block at the edge of ability, fixing one named problem at a time. Punctuate with short bursts above tempo to keep the fast movement available. Stop when the errors turn from random to repetitive, because at that point you are no longer practising, you are rehearsing a fault.

None of this is exciting and none of it is a shortcut. It is just an honest allocation of your attention across an hour, and it beats an hour of playing things you can already play.