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Hi joe - I'm enjoying reading version 5, but I was curious about why you and Coggan differ on the definition of zone2/3 For heart rate? Your bresknpojnt is 89% FTHR whereas his is 83%. Any insight would be appreciated thx

Tom Robinson

Joe Friel

D, Good question. I don't think it makes any difference which you use SO LONG AS the choice works for the training methodology you are using. If you are training based on his workouts etc then you should use his zones. Same for mine--or whoever's training methodology you follow. Good luck!

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