“Fitbit uses AI and machine learning, coupled with insights from its large database of biometric information to develop and continually improve its offerings,” he wrote. In an emailed statement Shelten Yuen, vice president of research at Fitbit, said the company works continuously to improve its algorithms. “How a child moves and how someone who’s 90 moves is very different.” “There’s a definite bias in there,” she said. “They were designed to measure purposeful walking.” But, she said, if you’re shuffling around in the kitchen taking small steps, or if you’re pushing a stroller or a walker, the accelerometer isn’t as reliable. “They do detect steps well if it’s normal paced steps, normal cadence,” Feehan said.
However, the algorithms used are usually based on data from studies that enroll college-age men, said Lynne Feehan, an associate professor in the Department of Physical Therapy at the University of British Columbia who is a co-author of a study on Fitbit accuracy. (We’ll get to that in a minute.)īecause it turns out moving fast and breaking things broke some super important things.
CALORIE COUNTING DEVICES SKIN
There are various ways your fitness tracker could go wrong, especially if you don’t fit into a fairly narrow demographic: light skin tone, in your 20s or 30s, with an average fitness level and “purposeful” gait. They’re used in clinical trials, research labs, and by insurance companies and corporate wellness programs. They measure heart rate, track sleep patterns, and calculate basal metabolic rate and calories burned. But even with all these trackers, the seniors couldn’t get an accurate step count because their movements were too slow to trigger the sensors in the devices.Ĭommercial fitness trackers are being used for all kinds of things other than tracking steps. They had devices strapped to their wrists and ankles, fastened to their belts, and wrapped around their chests. In a 2019 study, 18 senior citizens took a stroll on some treadmills while armed to the hilt with fitness trackers.
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