Imagine a product that increases alertness, boosts creativity, reduces stress, enhances your sex life, helps you make better decisions and keeps you looking younger.

Now, imagine that this product is nontoxic, has no dangerous side effects and, best of all, is absolutely free.

This miracle drug is, in fact, nothing more than the nap.

Sara C. Mednick, Ph.D., a researcher at the Salk Institute and the leading authority on the study of the nap, talked to Growing Bolder about her book, “Take a Nap! Change Your Life.”

She explained that that there are five stages of the sleep cycle.