Being active at age 5 helps kids stay lean as they age even if they don't remain as active later in childhood, a new University of Iowa study shows. "We call this effect 'banking' because the kids benefit later on, similar to having a savings account at a bank. The protective effect is independent of what happens in between," said lead author Kathleen Janz, professor of health and sport studies in the UI College of Liberal Arts and Sciences.

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