After hearing last night's weather forecast for today I didn't hang around after breakfast. I wanted to be out and about before it became too hot. Seemed like a good day for my Blacka Moor 'half marathon'.
From the outset I felt tired, heavy legs, hot; even though the air temperature was moderate at a mere 19ºC. I admit that I didn't push myself but by the end I'd really had enough.
Looking back at my GPS data I first logged this route in the summer of 2013 when I was 1 minute per km faster! I don't have heart rate data from that run so can't compare 'effort'. I'm aware that I kept my heart rate low today whereas historically I used to try hard on every run, but even so, it still felt tough today.