Are your feet supported when you sit in your chair?
We don’t often think about it, but all of our body parts have weight. Our legs weigh about 17.5% of our total body weight, for a 150lb person that would be about 26lb. If that weight is not supported but is instead dangling or hovering over the floor, that hanging weight can tug and put a lot of pressure on your lower back.
So if you’re having any lower back discomfort and your feet are not firmly supported, find a box or books or a footrest or a cushion or a rolled up yoga mat to give yourself proper foot support and take some pressure off your lower back.