For millions of people who struggle through strict diets only to see the weight quietly return months later, new international research may offer a surprisingly simple answer: keep walking.

A major study to be presented at the European Congress on Obesity 2026 has found that people who walked around 8,500 steps a day were more likely to keep weight off after dieting compared to those who remained less active. The findings, published in the International Journal of Environmental Research and Public Health, are drawing attention because they focus not on dramatic weight loss, but on the far more stubborn problem of weight regain.

Researchers say that is where most obesity treatments fail.

“The most important – and greatest – challenge when treating obesity is preventing weight regain,” explains Professor Marwan El Ghoch of the Department of Biomedical, Metabolic and Neural Sciences at the University of Modena and Reggio Emilia.

“Around 80% of people with overweight or obesity who initially lose weight tend to put some or all of it back on again within three to five years.

“The identification of a strategy that would solve this problem and help people maintain their new weight would be of huge clinical value.”

The research team from Italy and Lebanon reviewed 18 randomised controlled trials involving adults with overweight or obesity from countries including the UK, US, Australia, and Japan. The researchers closely analysed fourteen of those studies, which involved nearly 3,800 participants with an average age of 53.

The participants were divided into groups. Some people followed lifestyle modification programs that combined dietary advice with regular walking and daily step tracking. Others either dieted without structured activity plans or received no treatment.

At the beginning, both groups had almost identical lifestyles, walking roughly 7,200 steps daily. But the difference became visible over time.

Those in the lifestyle programs gradually increased their walks to about 8,454 daily steps during the weight-loss phase, which lasted nearly eight months on average. They lost around four kilograms during that period. More importantly, when researchers checked again after almost another year, many participants had maintained both their walking habit and most of their weight loss.

Their average daily step count remained above 8,200. Their weight regain stayed limited.

The control group showed little change in either activity or body weight.

Researchers found a clear link between maintaining higher daily step counts and reducing the chances of putting weight back on. Interestingly, walking more did not appear to cause dramatically greater weight loss during dieting itself. Scientists believe calorie reduction still plays the bigger role there. But physical activity seemed crucial in helping the body avoid slipping back into old patterns after dieting ended.

That distinction matters because obesity experts increasingly describe weight regain as a biological and behavioural challenge rather than a simple lack of willpower. After weight loss, the body often responds by slowing metabolism and increasing hunger signals. Many people also gradually return to sedentary routines without noticing it.

A quiet evening walk after dinner or choosing stairs over lifts may sound like a small thing. Yet over months, researchers say, these ordinary habits appear to create meaningful long-term effects.

Previous research from institutions, including the Harvard T.H. Chan School of Public Health and the World Health Organization, has also linked regular walking with improved metabolism, a lower heart disease risk, and better blood sugar control. However, the latest findings sharpen the focus specifically on preventing regained weight after dieting.

Professor El Ghoch concluded that lifestyle modification programs can lead to meaningful, long-term weight loss if people continue moving even after the dieting phase ends.

“Participants should always be encouraged to increase their step count to approximately 8,500 a day during the weight loss phase and sustain this level of physical activity during the maintenance phase to help prevent them from regaining weight.

“Increasing the number of steps walked to 8,500 each day is a simple and affordable strategy to prevent weight regain.”

The study highlights something remarkably ordinary in a world crowded with expensive fitness subscriptions, viral diet trends, and quick-fix promises: putting one foot in front of the other every day.