I have developed a system for my Parkruns. I programme the Virtual partner on my watch with the average pace of my PB. I then stick with that for 4k and then see what is left at the end. So far I have always managed to put in a good finish, hence the successive PBs. This Saturday may well be one of my last Parkruns this year due to holiday and the impending return of Strictly to our screens in September.