Yeah, planks every day, lots of stretches (not necessarily the right ones!)
I've had trouble with my lower back for many years, it was especially bad when I trained for those couple of 10k runs I did. Not saying I'm in "constant pain" or anything dramatic like that, and it's improved since I lost weight and generally got fitter, but I guess it's always going to be there.
And maybe at 48 going on 49, there's only so much I can do - in some ways I'm as fit and strong as I was in my 20s, the difference is that everything is a lot more creaky and exercise hurts a lot more! :lol:
The reason I mentioned it now in particular is that this new exercise bike really seems to aggravate my back, even though I've tried to set it up as much like the old one as possible. I guess it's just tiny things I can't change, like the shape of the saddle, the distance between the pedals... and I need to get used to them.