Thanks for linking to the study. That's a good point, about the short time limit meaning less inflammation of the sciatic nerve. Only way to know is to try it, I guess. (:

I have been doing mostly low-impact stuff (I don't even run on the treadmill; I walk) based on my PT's recommendations. But I could try jumping jacks and see how that feels. My Zumba class has a little impact stuff and it seems to go down okay.

We actually have a chin-up bar at home already! My partner uses it. I am not so keen on buying stuff right now but it's possible I could give it a go.

And I think kettlebell classes would not be good for me -- the movement seems too varied and uncontrolled for me to be sure of being safe of my injured parts.