DR MICHAEL MOSLEY: Hi-tech wristbands can be unreliable at monitoring your health
Daily MailAre you one of the 26 per cent of Britons who own a fitness tracker, such as a Fitbit? Take the popular belief that wearing a fitness tracker will help with weight loss — the idea being that if you use your tracker to keep yourself active, you’ll burn calories and lose weight. The term was coined a few years ago by sleep researchers at Northwestern University in the U.S. — they noted that with more and more people buying trackers, they were seeing lots of patients whose quest for a perfect night’s rest had led, ironically, to sleep problems. Her response was: ‘Then why does my fitness tracker say I slept poorly?’ So if you use these devices to track your sleep, take the results with a pinch of salt: the best measure of whether you’re sleeping enough is how tired you feel in the morning. But it’s the effect on children that I find particularly worrying Air pollution kills an estimated 35,000 Britons every year, mainly through heart disease and stroke.