Fitness trackers aren’t accurately assessing the physical activity of people with obesity, a new study argues. Differences in walking gait, speed, energy burn and other factors mean that folks with excess weight aren’t getting an accurate read from their devices, researchers wrote in the journal Scientific Reports. “People with obesity could gain major health insights from activity trackers, but most current devices miss the mark,” senior researcher Nabil Alshurafa, an associate professor of behavioral medicine at Northwestern University Feinberg School of Medicine in Chicago, said in a news release. Alshurafa’s team has developed a new algorithm that enables smartwatches to more accurately monitor the calories burned by people with obesity, researchers said. Lab tests show that the new algorithm achieves over 95% accuracy in real-world situations, the study says. “Without a validated algorithm for wrist devices, we’re still in the dark about exactly how much activity and energy people with obesity really get each day — slowing our ability to tailor interventions and improve health outcomes,” Alshurafa said. Alshurafa said he was motivated to create the algorithm after going to an exercise class with his mother-in-law, who has obesity. “She worked harder than anyone else, yet when we glanced at the leaderboard, her numbers barely registered,” Alshurafa said. “That moment hit me: fitness shouldn’t feel like a trap for the people who need it most.”… read on > read on >

















