Elderly gentleman
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How age sets your body clock

Each of us has a personal body clock - a "chronotype" that makes us more alert in the morning or more productive in the evening.

As the BBC's Day of the Body Clock charts the changes that take place inside in our bodies throughout the day, this video explores how your personal clock shifts throughout your life.

Video journalists: Victoria Gill and Dan Curtis

  • 12 May 2014
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