Thanks Michele.

It's specifically motorcycling that did it, it's not a new occurrence but I sure wasn't expecting it to bite me this hard this time, and I don't know what it is about the fit of my motos (both of them) that does it.

Lowering my seat height on the bici helped a LOT, because it's helped me reduce plantar flexion - so I'm surprised to read your post recommending raising it. It's been step by step, little by little, lowering my saddle and learning to stop plantar flexing so as to protect both my calves and my knees.

Been icing on and off most of the day - yeah, should've started earlier, but didn't think it was going to turn into this. Traumeel, near-infrared therapy, taking in your good wishes and radiating gratitude all around, keeping my fingers crossed.....