Health and fitness monitoring tools don’t need to lead to an eating or sleep disorder to raise alarm bells. A 2016 study carried out by CNN of 200 US women who all reported wearing a Fitbit regularly. It found 79 per cent of them felt “under pressure” to read their daily targets, 39 per cent felt their days were “controlled” by their fitness tracker and 30 per cent felt that it was an “enemy” that made them feel guilty.
