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Search title: John Speakman on Twitter: "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. @KevinH_PhD 7/ https://t.co/N0gLjkbwJd" / Twitter
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