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“Over there, look,” trainer Juilieanna McGuire says, pointing discreetly toward a young woman stretching her back over a large rubber exercise ball. “I used to try to correct them, but now it would be ...

Inflatable exercise balls -- used for decades in physical therapy for rehabilitating back injuries -- help build strength and improve balance by forcing the body to use more than one muscle at a time.

Fishers chiropractor Steven Roberts was driven to the drawing board by an evening spent watching his 6-year-old son bouncing around the living room clutching the handle of a Hippity Hop Ball. Roberts ...