Hello TB. I started playing bass about four months ago on a fretless bass. For most of that time I haven't played anywhere near enough. Last week though, I decided to take my playing a lot more seriously and since then, whenever I have a free day I play/practice all day, 8 or so hours a day with a few breaks in-between. On normal days I do about four hours. I did the 8 hour routine in the form of 3+2+3 hours (with small breaks every 20 or so minutes) twice last week with several recovery days of 4 hour practise in-between because I was busy. This week though I've been totally free because I've had no classes (I'm a student) and I've gone hard at the bass for three days straight. Last night, after wrapping up, I noticed some tightness in my left/fretting hand, around the knuckles. By today morning, it was mostly gone and I'm thinking about diving into another day of lots of practise. My questions are these: 1. Is it feasible to maintain such a routine 6 days a week for a year or two? At least until I overcome most of my bass playing inadequacies. Or will I need to fit in recovery days like athletes do? 2. Is this a stamina issue? How can I build up stamina? 3. What practise routines do you use, and what routines did you use PS: I know my left hand technique isn't the best, part of my practice is playing simple lines while concentrating on my left hand. I mostly use Adam Neely's "healthy" left hand technique but with a bit more use of the finger pads because I play fretless. Also, I use 1234 fingering a lot. I find that this works better than 124 when it comes to arabic music and it's many scales because it's a lot easier for me to "see the notes" on the fingerboard when playing 1234. 1234 is also easier for solo melodies. 124 works well for the rest of what I play, but at this stage I'd rather focus on one system and build muscle memory and stamina.