Its MHR-RHR *%+RHR
So if you have MHR of 180, RHR of 60, then 70% will be
3 lots of 800 metres flat out on the flat after a short warm up is the recommended I think. You should hit max HR in the 3rd set of 800.
well spotted.......... you should wait till next year. 366 less press-ups
I am also 39 and my measured max is around 208 bpm, so these formula can be way out. When not that fit, it is a struggle to run slow enough to keep below 70% in my experience, but this soon changes with some training.
btw there are 366 days in this year..........
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