Here comes one more reason to keep your smartphone out of the bedroom — or at least to keep it turned off until you’re ready to start your day. It also turns out that those guys at the gym with their faces buried in their phones might actually be onto something.
A recent study out of Sweden suggests that blue light — the same kind emitted from smartphones and tablets – can give you as good a boost as a couple cups of coffee, or even better. On the fitness front, this new research suggests blue light might actually help boost sports performance.
All of this is on top of previous research that says the light from smartphones suppresses melatonin production, making it harder for you to fall asleep.
Scientists from Mid Sweden University tested 21 healthy adults, comparing their reactions to short-wavelength blue light, regular white light, and 240 mg of caffeine, the equivalent of about two and half cups of coffee.