I’m quite light-sensitive, so the researchers I spoke to suggested using blackout blinds (which I already had) while sleeping, and I decided to wear my sleep mask for added protection. Then, upon waking, they recommended I immediately open the blinds to let in the morning light, which triggers a surge of cortisol, a hormone that allows us to be alert and ready for action. “That helps tell the clock, ‘Okay, this is when I start my day’,” says Simon.
