I've dealt with issues from the weight of basses for years. What I eventually did is give myself a weight limit of ONLY basses less than 7 lbs. While that seemed daunting at first, there are actually plenty of options, you just have to change your requirements and shop around.
This lead me to basses that are:
Solid body basses made of empress, pine, or super light ash. (G&L empress LB100, mine is 6.75lbs!)
Hollow body basses (Hofner, Rob Allen, etc)
Acoustic bass guitars (Tacoma, Taylor mini, etc)
if you stick to those parameters, it becomes even more comfortable to play without getting those health issues raging back. It's been great for me. I've never been more comfortable playing bass.
Another thing to note about those 3 types is you get a different SOUND from each. Solid, hollow, and acoustic. Surprisingly, it's much more fun comparing a P to a hollow and acoustic rather than just the standard old P and J sounds (which to most average people sound super similar) That makes for you having a lot more tonal variety for things like the studio, different genres, acoustic gigs etc.