12 Ways Being a Night Owl Could Hurt Your Health

Lower GPA: Research suggests that college students who sleep the least earn lower grades than those who sleep nine or more hours per night. Your brain needs to cycle through certain deep sleep stages to store memories and solidify the things you learn. When you fall asleep, your heart rate and metabolic rate drop so your body can focus on those things, says Dr. Paruthi. No sleep, no storage.