[quote name='urb' timestamp='1339767742' post='1694031']
OK here's the thing - the best way to build stamina is actually to play some long sustained notes on the bass - and rather than just banging away through fast, relentless songs, why not just play some simple scales or melodic patterns, slowly, in time and a few minutes at a time? This way you'll be not only building the muscles in your hands/arms you'll also be improving your coordination, timing and by holding the notes longer your tone as well. It's also worth looking at your bass's set up and making sure you're not fighting the instrument - if the action is too high, strings too heavy etc - you could be wearing yourself out just be fighting the physicality of the bass - get some medium weight strings and your bass set up properly - by a pro if possible - and playing should be a lot easier. Stamina/endurance also comes from playing a lot but can be helped hugely by working on your basic technique - it'll also help avoid any serious injuries bad posture and or hand position may inflict over time.
Hope that helps
M
[/quote]
Good post