After a flight in from London to Seoul and having been up for 22 hours now, I thought I’d brave the -2C to +2C temperatures to see what my mapped out 7km run would be like this week. “Hellish” is the answer: the first 2.7km is pretty much all uphill gaining some 500ft and just when I started coming back down, I discovered that the back part of the route was under hard-packed ice and snow. Ah…