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I would be grateful if someone could shed some light on the following and maybe provide a rational explanation and also re-assure me I am not about to expire!
I PB'd in a 10k on Nov 4th. (7 min 40secs per mile off about 8 weeks of 15ish miles a week training). I have done minimal running since (about 5 miles once a week) I just bought a HR monitor and went for a run at what I thought would be an easyish pace even bearing in mind loss of conditioning (around 9 min milles). I was suprised to see my HR at a constant 188bpm at this pace and up to 200 when I sped up to 7.5 min miles for the last half a mile. The effort level did not seem ridiculously hard (apart form at the end) Does this mean I have got very unfit quickly cos otherwise this would imply I ran a 10k at about 200 bpm which is surely impossible or very unhealthy. Any comments appreciated.