Naps also improve our overall health. A large study in Greece, which followed more than 23,000 people over six years, found that, controlling for other risk factors, people who napped were as much as 37 percent less likely as others to die from heart disease, “an effect of the same order of magnitude as taking an aspirin or exercising every day.”49 Napping strengthens our immune system.50 And one British study found that simply anticipating a nap can reduce blood pressure.51
