I thought I'd give it a go, it was my second run after graduating.
So Laura talked me through the pace I needed to keep ("1 2 3 4") and this was hard enough for the warm up walk let alone the run. My natural pace is brisk and my little legs don't have a wide gait so I really felt that it wasn't comfortable. Having to concentrate on the pace my legs were moving at also made me feel how heavy my legs were! I never normally notice this.
My maximum speed was 6.3 mph and my heart beat went as high as 167 BPM. I think this is when I started to feel dizzy, and so after about 22 minutes of running I walked.
I guess I won't be trying that again for a while!