Hey John, I ran all out for approx 1 min on the hill by the hospital after a 20 min jog. When I checked my HR monitor at the end of 1 min it was 187. So multiplying .7 X Max HR gives me 131.
A Max HR of 187 seems high for my age group. Do you think I should do another max HR test next week? I measured using a Garmin 45 forerunner wrist sensor.