MATT DRUDGE recently noted an anniversary of his aggregator news site with a Twitter post: “18 years of DRUDGE REPORT in February! And STILL sitting ;).”

Mr. Drudge, 46, hasn’t just been sitting for two decades. Like so many workers chained to their technology, he has been hunched over desktops, laptops, smartphones and tablets, and it’s all taken a toll on his body. He tries to limit the time he spends sitting to four or five hours a day, but sometimes he sits for up to 17 hours.

To ease his back, neck and shoulder pain, Mr. Drudge says he has learned how to adjust his posture. Whether he’s typing in the car, from the wooden folding chair in his Miami home office, or from a boardwalk bench at the beach on cloudy days, he makes sure to tilt the top of his pelvis forward, roll his shoulders back, elongate his spine and straighten his craned neck.

Mr. Drudge is one of thousands of people who have trained with Esther Gokhale, a posture guru in Silicon Valley. She believes that people suffer from pain and dysfunction because they have forgotten how to use their bodies. It’s not the act of sitting for long periods that causes us pain, she says, it’s the way we position ourselves.