According to Hadd, and Pete if you read this maybe you can help, he recommends for those who have a HRM of 193 or higher to start all slow running and build up mileage by running at appox 50 beats below your max. I figure this is at the lower end aerobic end. So here are my questions instead of bpm:
Slow recovery running equal what %
Easy running equals what %
Tempo running equals what %
According to Jack Daniels,
Threshold = 90% MHR
VO2max = 98-100% MHR
Long/Easy = 75% MHR
According to Pete Pfitzinger,
Threshold = 80-92% MHR or 75-90% HRR
VO2max = 95-98% MHR or 95-98% HRR
Long = 75-85% MHR or 65-80% HRR
Recovery = <70% MHR or <75% HRR
You can use Hadd's examples to calculate his three levels - But it looks like his calculations are based in simple absolute differences, and not %s, so that the %s are a bit non-linear (ie, depend on what the HRmax is). Using Hadd VI, here is HR expressed as %HRMax/100. See Hadd for definitions.
HRMax 193 183 173 163
HRMar 0.91 0.91 0.90 0.90
Easy 0.75 0.74 0.72 0.71
ILTHR 0.81 0.80 0.79 0.78