Just finished the big run of week 5, a couple of days later than planned, had a bit of pain in my left heel in the week so thought I should take a few extra rest days before the run. I did it on the treadmill (av speed 6.5k) and was quite surprised that I still had a bit left in me at the end (so did a last minute sprint of 9.k).
How much easier is it on the treadmill than outdoors? I remember having a bit of a struggle on the last 8 minute run I did outdoors (at the same speed), but today on the treadmill I found it so much easier. Just wondering if my fitness has improved that much or if it really is so much easier on a treadmill? If so, am I cheating myself by doing it on the treadmill?