1. Health

What is Chronological Age?

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Updated January 07, 2013

Definition:

Chronological age is the number of years of life you've logged according to the calendar. It's a number that doesn't change, regardless of how healthy a lifestyle -- filled with exercise and good nutrition -- you're living.

By contrast, your physiological, or "biological" age, is considered somewhat changeable, depending on how well you look after yourself. This is a concept explored in the RealAge system.

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