I agree with rjett about not having anything to lean on. It really does improve your posture. I sit on a balance ball at my office, and have consistently for about 10 months. It's really hard to slouch on a balance…
I agree with rjett about not having anything to lean on. It really does improve your posture. I sit on a balance ball at my office, and have consistently for about 10 months. It's really hard to slouch on a balance…