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Is Training Effect/Load impacted by setting custom heart rate zones?

I use the Training Effect and Training Load features from my Fenix 5, which as I understand are based on heart rate and other metrics from activities.

However, I am now looking to set custom heart rate zones for running and cycling as part of a program.

Does anyone know if the Training Effect and Training Load would be impacted by my setting custom zones? Ie: assuming you could do the exact same activity (time, heart rate, distance, etc, etc) twice - one as I've always done and then one after setting custom zones - would the Training Effect and Load numbers be exactly the same for both activities?

Thanks