Lacking balance can be dangerous. In the U.S., 3 million older people seek medical care for fall-related injuries each year, according to the Centers for Disease Control.

Maintaining good balance is crucial as you age. Asking these questions can help FILE - A couple walk on a sidewalk in Santiago, Chile, Wednesday on May 3, 2017. (AP Photo/Esteban Felix, File) ...

Maintaining good balance is crucial as you age. Asking these questions can help FILE – A couple walk on a sidewalk in Santiago, Chile, Wednesday on May 3, 2017. (AP Photo/Esteban Felix, File) ...

If you can balance on each leg for 10 seconds, you should be fine, said Greg W. Hartley, a University of Miami professor of physical therapy specializing in geriatrics.