A year ago, Lisa Annelouise Rentz, 41, an arts administrator and writer in Beaufort, S.C., made a simple but life-changing switch. "I heard that sitting is unhealthy, and after years of back pain, I decided to just stand up," she says. "I haven't used my 1950s rolling desk chair since."
Instead of vegging at her desk all day, accumulating aches and pains, Rentz now uses a multitude of small movements to wear a path between the various work "stations" she created in her home office—the desk with her phone, the antique sideboard where her laptop sits, the table where she spreads out projects. "After a few months I didn't feel tired at all and now I feel discernibly stronger," she says.
A burgeoning body of research suggests that Rentz may be gaining more than strength by getting up and moving. She's also developing protection from a variety of health risks. In study after study, sitting for long hours at a desk, behind the wheel, or in an easy chair has been linked to such ills as heart disease, cancer, type 2 diabetes, and premature death, even among those who exercise regularly. "The body is a perpetual motion machine," says Joan Vernikos, former director of NASA's Life Sciences Division and author of the recently released book Sitting Kills, Moving Heals. "We weren't designed to sit."
A large recent Australian study makes the point. Researchers showed that adults who sat 11 hours or more a day had a 40 percent increased risk of dying during the next three years compared to those who sat for less than four hours a day. "This was after taking in account the individuals' exercise levels, weight, and general health," says lead author Hidde van der Ploeg, a senior research fellow at the University of Sydney's School of Public Health.
Similar data come from the American Cancer Society. Combing the records of more than 120,000 Americans, researchers found that women who sat more than six hours a day were at a 37 percent increased risk of an early death, compared to women who sat less than three hours. Men were at a 17 percent increased risk. The association held even among those who did regular workouts. And a 2010 study led by the University of South Carolina's Arnold School of Public Health showed that men who reported more than 23 hours a week of sedentary activity had a 64 percent greater risk of dying from heart disease than those who reported less than 11 hours per week.
Activity breaks. Small wonder that more people, like Rentz, are breaking the sitting habit. Some are using desks that incorporate a treadmill or stationary bicycle, setting their computer's alarm to sound every hour or so as a signal to take an activity break, or wearing pedometers to motivate themselves to move more. Companies have instituted walking meetings, started employee dart leagues, and outfitted offices with sit-stand desks, all designed to increase employees' motions throughout the day. At Beneficial Blends, a Tampa-based company that markets coconut oil, employees take a 10-to-15-minute walk at 3 p.m. every day. "It keeps us sharp," says company founder Erin Meagher. "We talk through company strategies, brainstorm, and walk and talk off frustrations. Then we come back and are more productive than we would have been just stewing at our desks and staring at computer screens."
Robert Perez, 50, a public relations executive in Orlando, took up his employer's offer of a standing workstation a few months ago and now stands or walks about his office five hours a day. "The toughest part was trading in my comfy, high-back leather chair," he says. But increased stamina and weight loss have made him a convert to the concept.