Setting goals, finding strategies
The study intervention, called I-STAND, was based on health coaching to provide encouragement and individualized goal-setting. Since most people sit automatically without thinking about it throughout the day, participants figured out ways to frequently remind themselves to take breaks from sitting or stand more. For example, people used the fitness tracker’s hourly alert to move. Other participants added standing to habits they already do — such as standing to read the front page of the newspaper or for the first cup of coffee in the morning.
Participants wore an accelerometer that measured standing and sitting time, and a fitness tracker that could be set to go off at 15-minute to 60-minute intervals to remind them to take breaks from sitting. At the end of the study, the intervention group sat for 32 minutes less per day, on average, compared with the control group. Their average blood pressure was also almost 3.5 mmHg lower, comparable to reductions of 4 mmHg in studies of increased physical activity and 3 mmHg in studies of weight loss.
“When we sit, we aren’t using major muscle groups, and our blood flow is reduced,” Rosenberg said. “Changing those mechanisms could be one reason for the significant improvement in blood pressure that we saw in this trial.”
Due to the restrictions of the COVID-19 pandemic, most of the health coaching sessions were delivered remotely. Even though many participants only had virtual sessions, they were still able to change their sitting patterns.
Next steps
The researchers are looking at several possible follow-up studies that could take these findings further. In particular, they are interested in understanding whether a slimmed-down version of the intervention might work just as well.
“We aren’t sure which piece of this was most impactful,” Rosenberg said. “Do people need the desk and the activity tracker and 10 coaching sessions to successfully change their sitting time? Or might they be able to do it with one or two pieces of that? Having a little more insight will be useful when we look at how to best implement this in a health care setting where resources might be limited.”
The researchers are also interested in looking at whether the intervention has an impact on fall risk or brain health in older adults.
KPWHRI coauthors on the study are Weiwei Zhu, MS; Mikael Anne Greenwood-Hickman, MPH; Andrea Cook, PhD; Jennifer McClure, PhD; David Arterburn, MD, MPH; Julie Cooper, MPA; Stephen Perry, BA; Laura Yarborough, RN; Kayne Mettert, BA; and Beverly Green, MD, MPH. The study was funded by the National Heart, Lung, and Blood Institute.