That extended sitting leads to poor posture, which can ultimately lead to pain."
We also may do a poor job at keeping proper posture at other times.
And slouching for extended periods of time on a daily basis can actually cause issues well beyond lowerback pain.

For instance, slouching may cause or worsen headaches.
It also negatively affects your breathing.
Slouching constricts the muscles in your chest and abdomen, which can cause you to take more shallow breaths.

Slouching can also create a vicious cycle of weakened upper body strength.
Slouching can also cause heartburn.
People who slouch are more likely to have less confidence, poorer self-image, and suffer from depression.
