Ah, welcome to fitness cycling for old people. No bike required!
It is amazing how many times a great streak toward a current goal has been derailed by a sports related injury - knee, shoulder, back (repeatedly). Getting old isn't for the faint of heart.
We could probably have a great injury thread. But we can't have a strange and stupid injury thread, because I'd win all the medals:
Tore my quadricep tendon off of my kneecap bowling. Yes bowling.
Broke my wrist playing whirlyball.
My sons tease me mercilessly - and rightfully so.