I sit on a ball chair. It encourages me to bounce and move, not "slouch" or crumple into the chair (since it has a minimal back) and also makes it easy for me

I sit on a ball chair. It encourages me to bounce and move, not "slouch" or crumple into the chair (since it has a minimal back) and also makes it easy for me to pop up and stretch my legs. Sitting in my home office leather/traditional chair causes my feet to go cold, the ball chair doesn't have this same side effect. Also, leaning in a pinching your neck muscles/nerves is a major factor. Make sure you're screens are high enough, and close enough to discourage this behavior.