Living on the north east coast of England never thought I'd ever be asking this question but.... what do you do about the heat??!!?? I graduated from C25k in march and have worked up to my first 10k run 3 weeks ago. I had a bit of Achilles strain so did a couple of short 2 and 3 milers while it recovered. This week though I've really struggled - can't run half a mile before I grind to a halt Tonight was my third try - only managing 2-3 mile run/walk. It can only be the change in temperature. I started in the winter and havnt running n in the heat before Anyone got any tips for climatising myself?