Why are short sessions more effective?
Neuroscience is clear: muscle memory builds better through short, frequent repetitions than long, rare sessions. This is the principle of "distributed practice". Your brain consolidates learning during sleep. Giving it small doses each day allows it to process and strengthen neural connections every night.
How to organize your 15 minutes?
A format that works: 3 minutes of warm-up on the home row. 7 minutes of targeted exercise on your current weak point (a key, a combination). 5 minutes of free typing on real text to consolidate. That's it. You can do it during your morning coffee.
When during the day should you practice?
Morning is ideal — your concentration is at its peak and you create a habit from the start of the day. But the best time is the one that suits you: what matters is consistency, not the hour. Associate your session with an existing ritual (after coffee, before lunch) to never forget it.