Thoughts on Estimated RPE?

What are people’s thoughts on an estimated RPE value? Could either be based on previous RPE values or just a basic formula looking at HR/etc.

Could be kind of interesting/nice-to-have in the common event that someone forgets to log a real RPE?

No. It’s a subjective score. No computer or algorithm can tell you how hard an effort or session was. Just because an effort at X watts and Y HR had an RPE of Z today does not mean the same watts and HR produce the same RPE tomorrow, next week, next month or next year

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Yep, RPE is completely subjective. It needs to be disconnected from any metrics and in fact you should complete it without even looking at your ride data.