The Beddit app  on an iPhone. Your sleep app may be telling you about broken sleep that didn’t actually happen.  Photograph:  Jaap Arriens/NurPhoto via Getty Images

Fantasising about the perfect night’s sleep is not unusual for busy professionals and sleep-deprived parents. Getting a full eight hours is #weekendgo(...)

While the step-counter industry has led to a generation of fitness lovers fixated on achieving 10,000 steps, there is no known upper ceiling on how much is good for us.

In recent years, the 10,000-steps-a-day regime has become entrenched in popular culture. You can barely walk down the street without someone stomping (...)