I was wondering why the HR ranges differ in TFTNA to those found on most HR watches (like my Polar) and that are commonly found on line.
The PTI at work has us on a 12 week HR based running programme (targeting 5k/endurance), which is based on the more traditional HR zones and I’m wondering if I should adjust my zones to reflect those in the book.
NB. I’m using the 12 week running programme to help re-build my aerobic base after a FOB-centric deployment, before I get into a mountaineering training regime.
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