Some fitness trackers inaccurately measure running distance, according to analysis from the purchaser watchdog. Which? It examined 118 trackers using a treadmill to complete the gap of a marathon – 26.2 miles (42km). It discovered that the least dependable turned into the Garmin Vivosmart 4, which underestimated the space through 10.Eight miles – meaning the researcher ran 37 miles.
Garmin said it changed because that particular tracker did no longer include GPS.
It defined the Vivosmart 4 as an “all-spherical smart health tracker” and suggested that marathon runners use its Forerunner range which is GPS-enabled. Of the 8 Apple fashions concerned in the check, the Apple Watch collection 1 turned into the most accurate, over-estimating the gap with the aid of 1%, at the same time as the collection three overestimated via 13% – declaring that the runner had finished the marathon distance after 22.Eight miles. Our exams have located several fashions from massive-call manufacturers that can’t be relied on when it comes to measuring distance, so earlier than you buy, ensure you do your studies to discover a version that you can depend on,” stated Natalie Hitchins, head of domestic product and offerings at Which?