I know that running can be a repeat thread, however I seem to differ from the normal "being fit enough to knacker your legs" that seems common warnings on here.
I did a sprint tri at the weekend and my 5km time was 29:30, which is quite simply a bit rubbish. I want ro be running 26 minutes or less, but I just can't seem to run very fast. As soon as I run, my heart rate goes sky high, I get a stitch and I'm taking piddly little steps.
So practical advice please STW. I've trawled the Triathlon websites and they just seem to talk iron man.
Anyone got a training plan I can use to get my 5k time down?