6-9 hours a day!??! scales and arpeggios are essential to the non-fit pianists...you don't need them if you're hands and arms are "piano-fit" if you know what i mean. you have enough work-out for your hands in the pieces you practice. i have a challenging repetoire- tons of scrianbin, chopin, rach, bach p&f (yuck), all that stuff...sometimes i don't practice for a few days at a time, and some days i sit down and practice the entire day, w/out moving from the piano. practice when you feel the urge to- you'll get the most out of it if you're seriously into it. the rest of the time away from the piano, i spend thinking about my music. what do i want to do w/ it? how do i approach it, technically and artistically? when i am able to write out the music in my head and hear it, i know i'll be able to play it. think, understand, then play, and you won't need to spend of a lot of time to perfect a piece...this has always worked for me.