But we don't even need to get into who is more tired than whom. If we just start from the basis that (even though everyone is different but we're just using rules of thumb) one hour = one hour = one hour, it could very easily be accounted that way if anyone could be bothered.
Eg - if you get up 15 minutes earlier and put a load of washing on and the dcs' breakfast out and do a quick wipe round the bathroom - count it
if you WOH and have a longer commute - count it
if you make packed lunches, count it, and if you spend 10 minutes while you do it tidying and wiping the fridge, count that too
If you do the car insurance, count it, including if you do it in your "lunch break" (ha) at work
If you run round 15 mins before guests are coming throwing toys in boxes, hanging up coats and hoodies, plumping cushions, doing a mini super speed hoover of the sitting room - count it.
If you spend 10 minutes on the step discussing dc's behaviour with the child minder - count it.
I don't believe women (as a class) are more physically exhaustable than men (as a class). It's only a personal point of view, admittedly, but unless they are pregnant to breastfeeding, I think they tend generally to have at least as much stamina. They don't just get as many nice little breaks because they are in a constant buzz of multi-tasking. I can't even make a sandwich without a mini clean of the kitchen first because no other fucker will have cleaned it, or had the decency to leave it the hell alone, since I last did it. I can't full the kettle without pulling bits of salad and other crap out of the plughole and making it drain freely again. I can't do a load of washing without doing something to do with the last load of washing. I'm not exhausted because I am a weak and feeble flower, I am exhausted because I am always doing something.