A day of strange internal weather. At breakfast it feels an effort to eat. On arriving at work I feel sluggish - dull in the head, stomach queasy, oddly detached from things around me. Standing by the photocopier, a colleague asks if I'm feeling OK, "you look a bit peaky".

Having taught my classes, I head home & climb into bed. Radio on & that peculiar drift in & out of sleep when you're out of sorts.

Then, around 5pm it's as if the clouds have cleared. I realise what's really needed is a jog through the woods. So, on with the shoes & out.

The fresh air & exercise work their magic - whatever nasty little bug had got into the system has been sent packing.

Onward!