Sitting a lot has a lot to do with back pain, I can only tell you that from my personal experience. I’m use to walking outside daily and staying indoors has made that a bit hard. However, there are ways to help reduce this pain with out having to go outside.
Here are some links and sites that can help you achieve the goals of movement in your home.
Disclaimer: Before you do start, please call your doctor and ask if these can work for you first. ALWAYS ask your doctors first.
I hope they help you as they have been helping me.
Thank you to all the videos above.