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Scientists working to help astronauts regain balance after extended flights in zero gravity say they have found a way to use the research to help elderly people avoid catastrophic falls.

An "iShoe" insole contains sensors that read how well a person is balancing. The point is to gather information for doctors and to get people to a specialist before they fall.

Erez Lieberman, a graduate student who developed the technology while working as an intern at NASA, says a damaging fall is preceded by numerous warnings, similar to how high cholesterol and elevated blood pressure point to a coming heart attack.