This makes sense.

And, maybe i am advocating a luddite training concept but i am very skeptical that a power meter gives you every measure of "strain" that you need. It tells you the output, but it doesn't tell you how much input was required in order to generate it. I for one can say definitively that when i do the same ride, same average power on a very hot day vs. a cooler day my heart rate is higher and my recovery is longer (at least in the sense that i feel worse the next day), regardless of how much i drink during or afterwards. Same thing with running. If WHoop is supposed to quantify your strain for the purposes of prescribing your recovery, then this seems like literally exactly the kind of thing you want it to be picking up.