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	What Is Ergonomic Ball Chair?
	Done correctly, balance ball sitting results in better posture as well as increased motion in the pelvic region and low back. The ball chair... ehow.com

	What are the benefits of sitting on ball chairs?
	Exercising balls are beneficial because they help the body keep balance and distribute the weight properly. This can help people with lower back... answers.com

	How to Use a Ball for a Chair.
	1. Inflate the ball according to the specific ball's instructions. Note that different balls have different air PSI requirements. 2. Place the... ehow.com