... numb foot ...
It's not as bad as it sounds (the numbness is entirely superficial - skin deep, in fact), but it looks like when I push things a bit, spinning, I somehow pinch a nerve. The right foot is the one that usually goes numb, but in this case it's the left one. For now, I'll carry on with going at a flat pace, and attempting to keep nice and upright (I do tend to hunch over), and see if that's OK, but I'd better start looking for yet another alternative.
Actually, if I run out of all alternatives, I'm just going to bloody well run again. Really. When I run, I know that this clears. (And the way I fixed things up afterwards today was to go for a long walk. That didn't work as well as it usually does, but I think I might have ended up in spasm if I had just gone and sat down on a car seat after the spin.)
Alternatives? One of them remains proper cycling. The seat isn't so huge, and the pedals aren't so far apart. That might help. We'll see. At the moment, spinning will still do.
It was hard going again, today, but the machine says I used up 530 Calories, so that figures. 28 minutes, which got easier somewhere in the middle, and then hard again somewhere near the end.
Enjoy your running, friends! (But first stay injury free).