Running-tonights workout

Time for some intervall training again. I'm still on short intervalls. That is 500 m. I did four with some light running in between. My aim is to work my way up to treshold and stay there untill the lap is over. My split time is ranging from 1m 43 s to 1m 48s. In speed that is about 3m 30s/km. The laps in between I'm running the same distance back again but at a much lower pace using about 4m 40s on a bit longer distance. I'm still a bit worn out after the race last Saturday. It's possible that I must take a day off during this week. I'll se about that later on.