I've been doing OK in regards to my fretting wrist, however, recently I tried learning a song (Turn Me Loose by Loverboy), which is all octaves around the first 3 frets for the first 3 minutes of the song. I stink at octaves so I wanted to learn a song where I would be forced to practice them. After a couple of evenings of practice I had to stop playing and took a full day off yesterday.
I play a short scale bass using a pick and my thumb sits on the back on the neck. I'm definitely not what you would call a low slinger. In fact, I wear my bass fairly high and I only play seated due to lower back problems.
I'd like to learn the song, but I'm afraid it's just going to be one of those things to avoid completely. Tonight I'm working on Rock You Like A Hurricane by the Scorpions and am paying very close attention to keeping my wrist as straight as possible, which definitely helps in my case. My wrist is doing fine with this tune as with most of the songs I play.
I've had carpal tunnel surgery on both hands, but this seems to be a problem when using the ring finger. I always struggled with power chords when I played guitar a few years back, which is one of the reasons I switched to bass.
I'm 61 years old and don't have much in the way of flexibility in my joints. Never really did.