The following article was written by Alice Park and was originally published by Time on April 23, 2019. Every day, we modern humans stay comfortably seated on our behinds for hours at a time: binge watching shows on Netflix, pecking away on keyboards at work, scrolling through social media feeds. But do people really sit more than they used to? That’s what Yin Cao and an international group of colleagues wanted to find out in their latest study published in JAMA. While studies on sitting behavior in specific groups of people — such as children or working adults with desk jobs — have recorded how sedentary people are, there is little data on how drastically sitting habits have changed over time. “We don’t know how these patterns have or have not changed in the past 15 years,” says Cao, as assistant professor in public health sciences at the Washington University School of Medicine. The researchers used data collected from 2001 to 2016 by the National Health and Nutrition Examination Survey (NHANES), which asked a representative sample of Americans ages five and older how many hours they spent watching TV or videos daily in the past month, and how many hours they spent…