I used the '90 minute sleep rule' to stop morning grogginess — and it's better than any alarm clock

Our sleep tech tester sitting in a bed with white sheets and a rattan head board in the sleep studio checking sleep stats from Oura Ring on phone with inset of oil diffuser and sunrise alarm clock.

When you're trying to sleep well, there common rules, like no caffeine after 2pm, no phones in the bedroom. But sleeping in 90 minute segments probably isn't a habit many people strive to implement.

Yet as a sleep writer-cross-early bird, it's one I rely on night after night. In fact, I'd say my secret to waking up with energy lies in the '90 minute sleep rule.'