I had to double check my PB of 6k in 50 minutes.
First try was 6k in one hour.
Second try was 6k in 50 minutes. (PB)
This morning was 6.2k in 56 minutes, and this was after a sleepless night of listening to hubby musical snoring.
So my PB of 6k in 50 minutes must have been correct. I am happy.
I want to increase the 6k to 7k. Doesn't matter how long it takes.
As Laura said: it is not about speed but about endurance and distance.