Same goes for older people in general. Is it harder to lose weight because they simply move less? What’s happening that makes weight loss so much harder in 30s and above?
In: Biology
CI/CO is a really, really inadequate way to think of things.
There are animals that we breed for putting on more weight, faster, on the same amount of feed as other “less efficient” breeds. With livestock, we’ll happily point to genetics for weight gain.
That’s not necessarily relevant to your question — since you’re asking about age and hormones and not genetics — but it’s worth questioning the baseline understanding of “simply” CI/CO when you’re looking at weight.
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