system
Given the following post, respond as if you're commenting on Reddit:
human
There have been a few recent studies coming out that have claimed/proven that medium-to-long-term periods of sitting causes serious damage to one's health. How does this happen? What sort of damage is it? Is there less damage by simply laying down instead of sitting? Is it reversible?

Thanks for your answers.
gpt
Lying down won't help. The benefit is associated with getting up on your feet regularly throughout the day. The study found that too much sitting (or other sedentary behavior) is associated with shortened teleomere length.

Teleomeres are DNA structures that protect our chromosomes. Each time our cells divide, our telomeres get shorter, which is linked to aging. Once the telomeres get too short, the cell dies.

The researchers don't know why activity causes our teleomeres to lengthen. You can improve your telomere length by becoming less sedentary, so yes, it's reversible to an extent.