“It became almost impossible for me to fall asleep peacefully because the Fitbit was making me so apprehensive. I would lie awake in bed worrying that the night before’s sleep wasn’t good enough (just one hour and 56 minutes of solid, undisturbed sleep, according to my app) and that tonight’s could be even worse. Sometimes, I would try to lie perfectly still in order to fool the Fitbit into thinking I was asleep.”
Some researchers are starting to question the usefulness of sleep trackers. A new paper, published last month in the journal Sleep Medicine, links sleep-tracking apps and devices to more sleep problems, perhaps because of the way they tend to increase sleep-related anxiety.