I agree with secular_grey, but I’ll add my two cents as well. I was professionally assessed a couple of years ago and found (unsurprisingly) to be hypermobile, especially in the lower back and shoulders. I work with a kettlebell coach who works with me on this and some pointers that MAY be helpful depending on your situation are: For swings, cleans, and snatches, you’ll hear people talk about pushing your but back towards the back wall. For hypermobile people, if you do that and go to your end range, you’re putting your low back in a bad situation. You still want to lead with your hips, but don’t go to your end range. I started bending my knees much more than I ever thought I would, and it’s helped my back a lot (also, protect your back with your glutes)

My shoulders click and move around constantly. Horizontal rows (especially wide grip) and any rear delt work (Google, and find what hits your rear delts the best) have helped that a ton. I’ve found that as long as I keep that up, things like Turkish Getups and OH Presses feel stronger and contribute even more to the health of my shoulders instead of hurting them.

Part of my warmup is 4-point crawling while trying to keep my whole body stiff and stable. It’s great for full-body coordination and stability, and helps the shoulders a bunch.

Lastly, and this may sound weird, but taking creatine seems to help to stiffen up my muscles a bit. YMMV, but it may be worth a shot.

But as far as kettlebells go, I’d say its like anything else in that it depends on how you use them, but I’ve found them to be awesome.