Noted: Since then, many other studies have come up with comparable results. A 2014 review of six different studies found an average holiday weight gain of 1 pound. A 2017 summary of the research found similar results. Just 1 pound — but a significant pound because research also suggests that it could account for most (if not all) of our average annual weight gain. “Yup, it’s small,” said Dale Schoeller, professor emeritus of nutritional sciences at University of Wisconsin-Madison and author of the 2014 review paper. “But because it’s a large percentage, it’s not unimportant.” Schoeller calculates total annual weight gain by comparing the average weight of a 20-year-old in 1960 to the average weight of a 60-year-old in 2000. By his calculation, Americans gain about 0.8 pounds a year. Over the course of 20 years’ worth of Thanksgivings, he pointed out, it can start to add up.
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