Hi Indians, well done on your run today. If you want to go further, it's fine to run slower. Try going 3.5 miles next time, then build up gradually.
For those of you trying to get your 5km time down, one thing that helps is doing little bits of your run faster than usual, then you can jog or even walk until you catch you breath, then do it again. If you run In a Town you could decide you will run a certain number of lampposts or to the end of the block. I run in the country so I do it by time - not very long, just 45-90 seconds.
The time for the training run when you do this will be slower over all than your usual Time. And you will be more tired than after a run at your usual pace. But aftre a few weeks of doing this , hopefully your Parkrun time should improve .