I ran 12.5 K at night. It was the second session of the double training that I started today. I ran a 2.5 K circular course in my neighborhood 5 times.
Each lap is as follows:
1st 2.5 K: 13:11.46
2nd 2.5 K: 13:10.40
3rd 2.5 K: 13:13.83
4th 2.5 K: 13:29.45
Hydration break: 16.9
5th 2.5 K: 12.08.30
Total 12:5 K: 1:05.24
I wasn't sure how I'd run. But when I did it, it wasn't as hard as I imagined.
One thing I learned is that if you do hard training in the morning, and you run again in the evening, you fatigue earlier than usual; you haven't recovered fully from the previous training. I think it is good because you can simulate the kind of discomfort that you have to deal with in the final phase of a full marathon much sooner than when you run the same distance at night without early morning training. I think I like the double training. I will do it more often.
My next training is this coming Thursday. I am going to do speed training. It's a 50 minute alternate run. You run fast for one minute, and jog for the next one minute, and repeat it 25 times.