Prolonged sitting is one of the single worst things you can do for your health. Not only is it a cause of lower back pain and poor posture (slumping), it is associated with numerous other health outcomes.
They include obesity and a cluster of conditions — increased blood pressure, high blood sugar, excess body fat around the waist and abnormal cholesterol levels — that make up metabolic syndrome.
For now I want to talk about the effects on your lower back. One of the ways sitting causes lower back pain is by compressing and tilting your pelvis. The longer you sit, the more that tilt becomes ‘locked in’, effectively causing you to lose mobility in your lower back and pelvis.
You can regain this mobility with simple exercises. Here is a link to an article showing 5 exercises you can do in just a few minutes to decompress your lower back and improve your pelvic tilt.