There was a useful thread the other day which I now can't find and I wanted some info on Heart Rate Max. My theoretical HRM, calculated using the formula 220 minus age is 170. I know this a blunt instrument calculation but I did an XC race this morning using my new HR monitor that FC brought, and it suggests I was up to 204 bpm
Is that likely to be a problem - i.e. is there such a thing as a 'danger zone'? Assuming it doesn't bring about my immediate demise - where should Lactate Threshold be - c.85% of that max? That would give 173, which was in fact my average for the race.