Some questions for Jack111:
How Cardiosport calculate your preset resting HR?? Hr variability
How many monitors can show RRI in the market?? only three brands
Are Polar "Own" features validated scientifically?? No
Are
Suunto features validated?? Yes
The main important thing is that all brands use HR variability to make their own features but not all the brans use RRI technology, anyway the algorithms used to treat that info are not the same so acurracy is not the same in all brands.
Is cool that you trust in Gt5 but is it accurated??
Testing personally T6c's VO2 feature in the laboratory with gas-analysed submaximal text, the variation between T6c data and laboratory data is under 2% in trained athletes so the estimation is more than reliable.
You may try First Beat Athlete &
Suunto Memory Belt and their Daily Recovery Stress Report, hope will be useful for you.
Anyway EPOC and TE is the unique way to see the Chargue estimation (taking care or not of HR Zones) in real time and have inmediatly feedback after workout and none other monitors in the market have this feature.
Take a look on this:
"Influence of Increted Duration or Intensity in
Training Loads as evaluated by EPOC and TRIMS" Ruskko, H..- KIHU.- Finland.- 1-06-2004