TR:
Z1 = 65 - 74% MHR
Z2 = 75 - 85%
Z3 = 86 - 89%
Z4 - 90 - 95%
You do make me laugh sometimes:
I turbo to HR, but HR fluctuates a lot for me depending on tiredness
Yes, this is the point of HR training! When you are tired, you will be slower, but if you work within a HR range you are still working to the same effort level. Innit.
