Hi, I'm pretty new here, but I've read this forum a few times.
So I ran a few years ago(back in 2014/15) and got used to running 5ks, and then stopped and fell out of shape. I started going on long walks back in May of last year and worked into good enough shape again to run. I started really running again in early September of last year and have been doing it consistently since then - I did heavy incline training (13-15%) on a crappy treadmill Wal-mart by putting a 2x4 underneath for an hour while doing about 20 minutes worth of hand-weights while walking.
Anyways, I've been slowly been working my way up in speed over the past months and have gotten very, very good at running, to the extent that I can now do 3.1 miles in 13:00, or according to the treadmill, at a 14.3 mph pace. I've done it twice now and actually did a bit better the 2nd time around.
So my question is: How realistic is this compared to an actual road-run? My treadmill is properly calibrated and doesn't slip. The temperature in the area I run is usually in the mid-high 70s, if that makes a difference.