Yes I pulled a muscle early one morning bending down to pick up a kettlebell not warmed up. As with most of my back injuries I’ve had it was injured doing something completely inconspicuous. Then I drove 6 hrs to Disneyland and back and it just got tighter and tighter. It’s not a terrible injury just a nagging one. The problem with me as I always try and push myself to see if I can perform different things even with injury… and I kept pulling it again trying to stretch too far doing yoga.
I’m just getting over my semi regular ( 18 months -2 yrs ) back issue. Mine is simply that for whatever reason ( I suspect too much sitting at work ), I have to regularly do direct glute work, or I get back issues, not major, but enough to stop me from training. Then, I get it right and im 100%, so, being an idiot, I stop the direct glute work, which is fine for a while, until it isn’t. I have realised I just have to do it year round. Stupid thing is, I really don’t need much, dumbbell rdls twice a week or single leg rdls is enough to keep my glutes happy.