I had to mangle the title here to make it fit. Full text of the tweet reads:
> We are currently expending about 220 kcal/d less for males and 122 kcal/d less for females than people of our age and body composition were in the late 1980s. These changes are sufficient to explain the obesity epidemic in the USA.
Even more fascinating are the followup tweets in which they elaborate that it is a drop in basal energy expenditure responsible for these drops in the total rather than (as I, at least, was expecting) a drop in active energy expenditure.
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[ 3.2 ms ] story [ 14.7 ms ] thread> We are currently expending about 220 kcal/d less for males and 122 kcal/d less for females than people of our age and body composition were in the late 1980s. These changes are sufficient to explain the obesity epidemic in the USA.