While earworms are (thankfully) not real worms, they’re still a nuisance. Oh, what are earworms? Well, they are those few song lyrics that play over and over in your head while you lay in bed—and they don’t just happen when we’re awake. As one researcher learned from personal experience, they can even happen while we’re sleeping!

Thanks to that same researcher’s curiosity, we now better understand what makes earworms tick and how to get rid of them.

A new observational study found that physical activity and sleep quality both play roles in health outcomes. This information is particularly important for those who do suffer from poor sleep, as physical activity not only improves sleep but can improve the overall health of those who struggle with sleep disorders.