Shiny sun

The summer is definately here again, and today there was 25+ in the shadow. Went up to Sognsvann and ran one time around the water. Not many other people were running, probably because of the heat and maybe a lot of people have already left on holiday. Used 20 minutes around the water (3,2 K). A little bit too fast for me, but OK for a check. Result: Not quite there were I want to be....I wouldn´t exactly be able to keep this speed for 21 K...my HR max was 187, average at 174. Way too high!