system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: every now and then I will sleep for 18-20 hours in a row because of weird work shifts. For a few hours after I wake up my body feels like everything is on backwards. Motor skills are harder to use, walking is a challenge because my legs feel like they don't work. What is happening here?
gpt
Its called **sleep inertia** and is really common for people who catch up on sleep by resting for a really long period. On nights you expect to sleep this long drink a bunch of water and make sure natural light can get into the room (this will ease waking up for you). Try taking a cold shower and/or having a coffee 30 mins after you wake up.