And you titled this thread as “trying to regain a little fitness”? Yeah, getting back on your bike is a victory in itself. Maybe hold off on Sufferlandrian glory again until you can manage HM (or anything) without pain?
Were these injuries cycling related? This type of thing is somewhat more common among mtbrs. I myself have a post surgical followup appointment today after having had nose surgery from a mtb otb face-plant.
I know this was long time ago, but as the recipient of multiple broken ribs on several occasions, please allow for complete healing anytime you break ribs. You might feel well and pop a rib into your lungs. That’s never a good thing.
Heal up and then Suffer!