Just tried this this morning. Very funny hearing a man saying "Hello my name is Laura" or whatever words were used. The plot with this "tape" is to run 5 minutes at one pace, then a small increase in speed for 5 minutes, then another small increase for 15 minutes, followed by 5 minutes of either walking or slow jogging to suit yourself. Great! Another experiment to try for after the 5K target.
I was doing great, the first 5 minutes pace was about my default jogging pace. Handled the next 5 minutes OK, then kicked into the top speed, really focusing on "locking onto the beat" as they keep saying - 1,2,34,1,2,3,4 etc. Went about 9 minutes and was thinking "I can do this" - then was forced to stop by traffic lights and a heavy flow of traffic. And it was like being snapped out of a trance! All of a sudden I was aware of tired legs and stopped!
The route I take is pretty much a straight line down a main road, and at whatver point I've stopped I can catch a bus back. Having stopped at this point today I looked up and saw a bus coming - bus stop about 100metres away - without thinking I started sprinting for it. Half way there, the penny dropped! "How come you can sprint like this if you're so tired"!!! Oh the brain is tricky!