>Running 101>My slow pace and fast Heart Rate
I don't think there's anything magical about staying under 70% while racing that distance, and indeed, it sounds quite low to me for a race.
What's more important is what your body and your fitness are. If you are well prepared and well conditioned for the distance, then you will be able to run most, if not all, of the race.
Personally, I wouldn't race with a HRM, except for data-gathering purposes. That being said, how did you determine your heart rate to begin with? Additionally, have you tested it recently? You should be running faster at a given heart rate than you were when you started (assuming you're being consistent).
Another thing to consider.....Don't worry about the numbers so much right now. You're still relatively new to running. Your HR is going to probably be all over the place. I would work on increasing the number of days a week you run, and the distances / amount of time (whichever you prefer) you run at a time. I would work on cutting out the walking. Don't worry so much about where your HR is all the time.
Sub 19:00 for 5K 05-03-13 Clee Prom 5K - 19:00:66 that was bloody close!
Sub-40:00 for 10K 17-03-13 Gainsborough 10K - 39:43
Sub 88:00 for HM
To paraphrase an old poster: Today is the first day of the rest of your training. It doesn’t matter where you started or how far you’ve come. Today is the day. Your training didn’t start 6 weeks ago. Your training started the last time you hit the road. John “the Penguin” Bingham Life is not tried, it is merely survived if you're standing outside the fire