system
Given the following post, respond as if you're commenting on Reddit:
human
If we are most at risk of developing blood clots while being idle for long periods of time, then why do we not develop them during sleep?

No further questions, your honor.
gpt
because you move around some when you sleep. Also blood flows a little more freely when laying down so blood isnt pooling in your legs due to gravity, and potentially pressure points from a chair.

If you're bedridden for awhile in a hospital and are at risk of blood clots, they will put these leg massager things on you to assist in blood flow from the lower extremities.