Yeah....probably not used to running longer distance runs and i over mileaged too often too soon. 4.45 pace actually i started off in zone 2 for the first few 2-3 km, basically it was supposed to be a (long) tempo run which is up to 60 min....but of coz i over ran a bit i guess.
After got a bit of joint/bone pain starting i just cut the distance back to 10-11km and after that in June we all received the info that it is virtual this year then just cut these longer runs out totally.
My base is supposed to be mainly through cycling (i can milk more improvements from this discipline). Also for practical reasons, a bit stupid to train for base via both running and cycling, might not even help aerobically and just build fatigue while increasing injury risk (eg like those > 3hr long runs for marathon training.