Which is better, one long walk or many short ones?

A new study suggests that going on longer walks may have more health benefits than taking the same number of steps a day over multiple short walks.

Hundreds of studies have shown that higher step counts are tied to lower risk of dementia, Type 2 diabetes and other health issues. But how best to get those steps in is less clear.

The new analysis, published in the Annals Of Internal Medicine on Oct 27, is one of the first to study whether spacing steps out or consolidating them is linked to better health outcomes.

The analysis looked at people who took fewer than 8,000 steps a day; most participants took fewer than 5,000.

Those who regularly walked longer than 15 minutes were 80 per cent less likely to die from any cause and nearly 70 per cent less likely to develop cardiovascular disease over a roughly 10-year period, compared with those who got most of their steps in walks of five minutes or less. (The average age of the participants was 62, so the risk of dying was fairly low to begin with: about 4 per cent in the shorter-walks group and less than 1 per cent in the longer-walks group.)

This data shows only a correlation; it does not prove that taking longer walks is healthier than spacing your steps out over the day.

But some evidence suggests that your body needs more time and continuity to fully tap into exercise’s health benefits, such as improved heart rate regulation, said Dr Robert Gerszten, chief of cardiovascular medicine at Beth Israel Deaconess Medical Center, who was not involved with the study.

“We’re not saying shorter bouts don’t work,” said Associate Professor Borja del Pozo Cruz, a public health researcher at the European University of Madrid, who led the study. “But it seems like it’s much better to accumulate steps in longer periods,” he added.

The researchers followed 34,000 people in Britain over about a week, using accelerometers to measure steps and sorting participants into several groups based on their walking patterns. They analysed the data so the total step counts were similar across all groups.

Steps were counted on any type of walk. Those who went on 15-minute walks might have been strolling around the park, while those with shorter bursts might have been doing light housework.

After accounting for overall health and lifestyle factors, the researchers found that people who got most of their steps in shorter walks had a greater risk of developing cardiovascular disease and dying from any cause over the next 10 years, compared with those who took more continuous walks.

The drop was especially sharp in sedentary people, or those who took fewer than 5,000 steps a day, Prof del Pozo Cruz said.

The study is not the last word on the best way to walk.

The research factored in how people rated their health, but it is possible that those taking more continuous walks were healthier to begin with, said Dr Rishi Wadhera, an associate professor of health policy and management at Harvard T.H. Chan School of Public Health, who was not involved with this study.

The study also did not account for how walkable neighbourhoods were, or any strength training of the participants. And step patterns were based on a one-week snapshot, which might not reflect someone’s daily habits, Dr Wadhera added.

Still, experts said you should try to walk a little more each time if you can. Try getting off the bus a stop early, parking your car a bit farther from the office, or catching up with friends over a stroll.

“Some is better than none; more is better than some,” said Dr Hannah Arem, a public health researcher at the MedStar Health Research Institute in Washington.

“It’s about an incremental increase over time and trying to find those longer bouts to have more health benefits,” she added. NYTIMES