Play sitting down?!
Depends on the music genre I guess (still, could be a novelty in a punk band, you could have a steam punk chair!). I don't play standing up anymore, I literally can't be @rsed. But then I'm not playing bass in a punk or metal band. Still, since playing only sitting down I've had zero physical issues associated with playing, and I have two crushed disks in my lower back.... which is also the the reason I play drums with a back rest on my throne.
Other alternative, play an eub, then zero wait on your body. I've got an NS Design, which actually just sounds like a giant fretless so good for other than jazz, and I have that on a stand and play it standing or sitting on a bar stool if I'm feeling lazy. Looks good on stage as well, always gets comments from the punters.