Why does my back hurt when I sit Whats the best way to sit

We all sit way too long, especially as we get older. Maybe adults should have recess also. However, we do need to sit and this can cause significant lower back strain and pain. We want to keep our lumbar spine in neutral while we sit, watch the video to learn how. How long can I sit without harming my health When I do need to sit, how can I avoid a sore back or hips