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I use HR measurements based on the individual values of my goalies. main ones are max HR rate and from there I can calculate their zones and then of course I need to know what their anaerobic threshold is.
I know for all my goalies where their performance is at peak and when they get to the zone that every shot is dangerous etc... It is all based on following and recording their HR rates at practices and games & matching to their performance.
Jukka
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