[yorwba]

> people are exercising on average more today than in 2010 or 1990, and more than office workers in 1950, and still obesity is going up

SMTM's source [1] shows that "Percentage of adults aged 18 and over who met 2008 federal physical activity guidelines for aerobic activity through leisure-time aerobic activity" increased from slightly less than 45% in 1997 to slightly less than 55% in 2017. (I did not see a source for office workers in 1950.) But what really matters is the total physical activity. I'd be highly surprised if the increase in leisure-time exercise compensates for the decrease in jobs that require physical exertion for eight hours a day, every day.

[1] https://www.cdc.gov/nchs/data/nhis/earlyrelease/EarlyRelease... "Leisure-time physical activity" starts on page 43.