I'm new here, so apologies if this has been discussed before!
I have just started running outside (with a GPS watch), whereas previously all my running was on a treadmill.
I've found it so much tougher outside, it's really depressing! Either i stick to my treadmill speed and can only manage half the distance i would normally expect to do, or i run at a comfortable pace, which is about 1 mph less than i would normally run indoors.
Is this just me or do others find a big difference? For what it is worth, my outside run is mainly round the local park, and about 20% of it is on road.