Heart rate and power zone mismatches

it feels great when I see my FTP go up! :rofl:

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If i were to guess I’d say its the difference between feeling tired and exhausted.
3 hours into a Z2 I’m beginning to feel tired but not exhausted.

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Last weekend for example I did 3 hours Saturday and 4.15 Sunday. So I’m definitely familiar with that feeling. This was just about my highest ever volume week (over 15 hours). Next 3 consecutive weeks of the plan build out to 18 hours. I’m expecting to feel tired a fair bit… If that’s normal and expected to get those adaptations I’m fine with that though.

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