I’ve just completed run 2 of week 6. I wear a Fitbit and noticed that during my run today I was in my peak heart rate zone for 27 minutes. Looking back through my stats, I’ve been in my peak heart rate zone for over 20 minutes during most of my recent runs. Is this ok or am I exercising too hard?
I’m a 57 year old woman, with a resting heart rate of around 57-60 and was a regular walker before taking on this challenge. My heart rate zones have been calculated by subtracting my age from 220.