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Why does your body clock change with age?
As we age, so do our body clocks. Doctor Russell Foster tells us why.
Everybody has what is known as a chronotype, which determines what time of
day we are most alert. This is set by a part of the brain called the
suprachiasmatic nucleus, which acts as our ‘body clock’ sets our
daily rhythm. It is known to vary depending on gender age.
Recent research suggests that our hormone levels may help explain this
change. Testosterone, which rises sharply in teenage boys declines as men
grow older, has been shown in animal studies to impact on the ‘body
clock’. This might explain teenagers’ generally later chronotype compared to
adults.
Similarly, the hormone changes that occur as we age may explain why we are
more likely to wake up earlier as we get older..
For most of us, however, the timing of our working day stays roughly the
same throughout our entire lives. So what can we do to help us cope with the
inevitable disconnect between our chronotype our daily routine?
In some schools, experimental timetables, designed to fit teenagers’
chronotype, are being trialled. By starting classes at lunchtime finishing
late, some early indications from Hampton Court House Sixth Form are that pupils
are more productive.
For most of us, shifting our work day in this way is simply not possible.
However, there are ways to encourage our body clock to be more closely aligned
with our daily routine. These include:
Your body clock is re-set by light, so make sure you’re exposed to natural
daylight as soon as you can in the morning.
Keep getting up at the same time every day, even on weekends.
In the hour before bed, avoid screens such as phones, laptops
tablets.
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