Diagnose Why My Practice Isn't Improving Anymore

You put in the hours but you have not improved in months. Describe a typical session and how long you have played, and it diagnoses the likely reasons for the plateau, then explains the psychology and physiology behind why repeating the same things stops working. You walk away knowing what to change, not just that something is wrong.

I've been playing {INSTRUMENT} for {YEARS_PLAYING} years and feel completely stuck. I practise around {WEEKLY_HOURS} hours a week but my playing hasn't noticeably improved in {PLATEAU_DURATION}.

Here's what a typical practice session looks like: {PRACTICE_DESCRIPTION}

Please diagnose the most likely reasons I've hit a plateau and explain the psychology and physiology behind why repetitive practice stops producing gains. Then give me five specific, science-backed interventions I can apply this week, each with a concrete example of how to apply it to {INSTRUMENT}. Be direct and critical if my current approach has obvious flaws.