I didn't say it's high. I said it's an increase over 55-60. The claim was that walking doesn't increase ones heart rate, which is, assuming we can agree that 10

I didn't say it's high. I said it's an increase over 55-60. The claim was that walking doesn't increase ones heart rate, which is, assuming we can agree that 100 > 60, is demonstrably false. As for my estimate of my fitness, I think just the fact that my resting heart rate is below 60 might suggest something to that end.