[rubicon33]

Turning your head causes you pain? You need to go to the gym, get in shape, or figure out what the hell is causing a natural motion to induce pain and discomfort.

[kaba0]

Sitting is a natural motion and hundreds of millions of people have spine problems from that alone.

[achenet]

sitting is natural.

Sitting on a chair, at a desk, staring at a screen, for 8 hours a day, 5 days a week, and then sitting in your car, and then sitting on your couch and never actually walking anywhere, isn't.