Hands separate practice is so important for maintaining or training the independence of the hands. 

A common scenario: an advanced student appears to have everything together when playing hands-together — fluent scales, polished phrases, neat coordination — and then, in a rehearsal or exam, is asked to play one hand alone and stumbles or gets stuck altogether. Why? Because over-reliance on hands-together practice can hide interdependence. It lets the stronger hand (or a joint muscle pattern) carry the piece; it masks small timing and balance problems; and it can cement a fused muscle memory that doesn’t transfer easily to independent part-playing.

Hands-separate practice is not just for beginners. Even at advanced levels it trains the brain and body in important ways — it trains independence of touch and rhythmic security; and sculpts voicing control, and the ability to bring out a cantabile melody inside dense textures. Legendary pianists — Glenn Gould foremost among them in Bach interpretation — showed astonishing division of voice and clarity between (and within) hands. That independence is a skill that can be practised and trained.

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What hands-separate practice actually develops

• True independence of line: each hand learns its own phrase shape, dynamic contour and breathing points rather than following a shared overall push and blending with the other.
• Clearer part-playing: you can reinforce which hand must sing and which must accompany, and how to shape each voice — and these become better ingrained in aural memory.
• Robust muscle memory: independent muscle memory prevents the hands from “leaning” on each other — if one hand slips up or forgets, the other can still stand alone. Interdependent muscle memory can cause both hands to go wrong together.
• Rhythmic security: polyrhythms, asynchronous entries, and small rubati are safer when each hand is secure in its own timing, instead of relying on the other to know when to come in. This also develops better sense of pulse and rhythm in general.
• Expressive control: cantabile playing depends on micro-control of weight, timing and release that hands-together often smooths away if the muscle memory of both hands becomes too fused.

Common objections — and why they don’t hold up

• “Hands-separate is only for beginners.” — Not true — beginners are still learning coordination and may have trouble with hands together playing, but advanced artistry depends on separating and then reuniting the hands deliberately. It’s a more advanced skill.
•  “Doing it hands-separate will ‘mess up’ my hands-together muscle memory.”  —  If separate practice seems to produce conflict, the error is in how it’s done: sometimes students practise too fast, or attempt complete performance speed before the parts are secure, or inadvertently do something different when playing hands separately vs together. Done slowly, with correct phrasing and rhythm, separate practice enriches hands-together stability. Also bear in mind that it is often unrealistic to expect your initial hands together playing to be as fast as what you are capable of with the same piece hands separately. This is where a lot of people fall down — again, trying to play too fast before they’re ready.
•  “I want the music to sound nice straight away.” — ​That desire is understandable, but short-term gloss often costs long-term control and can lead to reinforcement of undesirable movements — it’s a shortcut. The extra minutes today save weeks of correction of bad habits later.

Practical hands-separate routines 

• Warm-up: 5 minutes scales or arpeggios one hand at a time, focusing on consistent tone and evenness.
• Melody isolation: play only the melody hand and tap the accompaniment part or the beats; exaggerate phrasing and breath points.
• Accompaniment focus: practise the accompaniment alone focusing on precise rhythm and pulse, refine articulation and pedalling (if included).
• Isolation drills: take a two-bar snippet in isolation (particularly from a problem area) and practice each hand alone for 5 repeats, then reintegrate.
• Polyrhythm practice: for a passage of music containing polyrhythms (e.g. 3s against 4s), practise slow polyrhythms hands separate, ensuring the rhythm is precise with even pulse (even if rubato is going to be added later), then combine once each hand is secure. Keep going back and forth between hands separate and together.
• Part subtraction: play both hands, then abruptly remove one hand while keeping the other going — aim to “hear” the missing voice.
• Different speeds: practise hands separately at a speed you can reliably play fluently (this might be up to speed), aim to reinforce the sense of flow by not pushing this speed up too much (flow doesn’t equal speed). Then play hands together at reduced tempo aiming for clarity and precision, again to reinforce the habit of flow by not rushing to the point that you have to keep stopping and starting.

Try this for a substantial proportion of a practice session (more for repertoire heavy in counterpoint). The goal is not to abandon hands-together but to give each hand an independent voice.

A little anecdote from my teaching

I’ve seen students insist on only hands-together scales despite repeatedly cautioning them against it. In an exam, when asked to play one hand alone, they couldn’t — the muscle memory for their hands was fused. This is when students sometimes accept that their practice plan needs rebalancing. The fix is systematic separate practice until the independence is habitual.

Glenn Gould as an example

Glenn Gould’s Bach recordings are often cited because his part-playing clarity and independence are so remarkable. Gould’s technique — extreme attention to contour, articulation and voice separation — shows what hands-separate mastery can allow: inner voices that sound alive even in dense contrapuntal textures. He is inspiration for what disciplined separation can produce.

Short practice checklist

•  Allow 10–20% of your practice time to  focus on hands-separate work.
•  Always start slow; increase tempo only after independence is secure.
•  Use rhythmic variation and articulation contrast to lock in independence.
•  Record yourself and listen back: if the melody disappears in playback, do more separate work.

Final thought

Hands-together practice builds coordination — that is indispensable. But independence is its own discipline. If you want true cantabile phrasing and reliable part-playing, you must give the hands the chance to be themselves, and avoid short cuts. This nuance — shaping the melodies and bringing out certain parts above others makes all the difference between a performance that just sounds correct, vs a performance that really sounds polished and convincing.