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Running/Jogging is weird, some days you get in a zone and it feels easier and the physical suffering is not bad. On those days I'll jog a bit faster rather than longer. You look pretty fit, I would guess that you can run at an 8'30" if you wanted to.

I like to run and feel good so not always race pace. In a 5k yes 8:30 and below are now issue at the moment. 👍🏻