system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What happens to your body if you stay seated all day?
gpt
You can become susceptible to something called "deep vein thrombosis".  Blood pools in your lower extremities and can form a clot in one of the larger veins in your leg.  That clot can break loose and get lodge in your lung, causing a pulmonary embolism and sudden death.