Does anyone here do research-based phys? Am I the only one who doesn't remember learning anything in the subject relevant to the last question about exercise in pregnant women? After sitting there with a blank mind for ages, I finally came up with an answer but not from stuff we had learnt this semester... I even asked Val if the values were right because nothing like it came up during the semester!
I did PHYS20009 in semester 2 last year. If your question was the same as mine, then I'm pretty sure that it had to do with metabolism. I can't remember the values given, but I think the pregnant women had more body fat? and I think their respiratory rates were significantly different too?
Anyway, the crux of what I said was that fat, protein, and carbohydrates all have different rates of metabolism (RER), so by virtue of having more adipose tissue, the amount of oxygen required to metabolise the fat would be different to someone who has relatively more protein in their body composition. From memory, fat had a value of 0.7, protein of 0.8, and carbohydrates of 1.0.
Out of curiosity, what did Val say about the question?
I did this exact thing!!! but less travel time sort of helped (no it didn't I'm lying)
Yeah, less travel time was one of my reasons too.