Pulling an all-nighter is rough enough. But dancing for 30 hours after waking up on March 6th before Dance Marathon starts? Deathly. Just imagining it will make you tired. Skipping shut-eye can not only make you drowsy, but screw you up in other ways:

Hour 10: Your Memory
Leave Reading Week studying until after DM. A German study found that sleep deprivation negatively affects students’ ability to commit information to memory. Students who weren’t allowed to sleep for 10 hours after they memorized vocabulary lists were able to recall 15 percent less information 48 hours after studying even though they were allowed to go home and sleep the day and night before testing.

Hour 13: Your Heart
And you thought the only beat you had to worry about was the one banging from the speakers. A Turkish study found that by 8:00 the morning after a sleepless night, healthy young adults were more prone to arrhythmias or irregular heartbeats. Just look to last year’s DM dancers for proof.

Hour 30: Your Body’s Ability to Self-Rule
And by self-control, we don’t mean your sudden inability to stop yourself from assaulting your ex dancing a few feet away. A Finnish study found that 60 hours without sleep caused a decreased heart rate and lower body temperature, indicating a change in your heart’s self-regulation and your body’s overall thermoregulation.