I decided to repeat my little experiment from yesterday since it wasn't as hot out when I ran today (maybe 80 degrees instead of 100). The results were interesting. Here are the half mile splits:
yesterday today
2:55 (average HR 160) - 2:50 (average HR about 153)
2:51 (average HR 166) - 2:43 (average HR 163)
2:44 (average HR 173) - 2:45 (average HR 162)
2:50 (average HR 160)
I ran the last half mile because it is a little flatter than the previous mile and a half, although I think it has a net uphill, while the previous section of trail has a net downhill. I think the results of this little test tell me a lot about how my body reacts to the heat. In order to go the same speed as yesterday along the same section of trail I did not even need to run marathon effort today, whereas yesterday I was going considerably harder. It is not like it was cool today either. It was still warm, just not scorching. Total time of 1:29:28 for 12 miles |