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Fitness Trackers: Good at heart rate measurement, not so good at calorie measurement.

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Fitness Trackers: Good at heart rate measurement, not so good at calorie measurement.Stylish and high tech wristbands are very popular these days, with the promise of measuring heart rate, measurements taken during the day, sleep, calories burned and even stress.And, increasingly, patients are directed to the physician armed with large amounts of data collected from their devices. They are essentially asking to digest the data advice and provide information on how to avoid cardiovascular disease, says cardiologist Euan Ashley, associate professor of medicine at Stanford University of Medicine and Stanford Hospital and Clinics in Northern California. And, being something close to Silicon Valley, it says it gets a lot of technology-savvy patients with what fitness-Tracker data for dating.The problem, is that he did not know how reliable the data was. Therefore, he and his colleagues decided to study seven of the most popular devices and compare their accuracy to the standard gold tests that medical use.Two measurements were taken: heart rate and calories burned. For heart rate, fitness followers were compared with the results of an electrocardiogram, or EKG. It turned out that the devices were surprisingly accurate. Most devices most of the time were off by only 5 percent.However, when it came to measuring how many calories a person burned, the results went very far, showing a degree of imprecision ranging from 20 percent to 93 percent, which means 93 percent of the time Worst performing device was bad. The researchers compared the results of wrist devices to a sophisticated metabolism calculating system that measures oxygen and carbon dioxide in people's breath.#Crawlers #fitness #devices #resperson #metabolism #oxygen #calories #electrocardiogram #information #ymasciencia


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