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Having just recorded by first half marathon and previous trainging runs, I notice my heart rate rockets up to about 175-185 for the first 5-6 minutes and then settles down to about 150ish for the rest of the run.
On the Loch Leven half marathon this weekend, I got a shock when I downloaded the HRM profile, for the first 3/4 mile my heart rate was above 220bpm peaking at 229bpm, my pace was the same as for the rest of the race, 8min/mile. The heart rate then settle down to about 145bpm for the rest of the race and averaged 149 over the whole distance. he bpm did not rise much even when my pace did, or on hils for which I pace did not really slow.
These are encouraging, i.e. consta and reasonable low hear rate over the distance, but is my heart safe up at 220+bpm for the a mile?
Slightly worried, but very encourage, which one should I be, or both?