A very clever experiment by researchers at the University of Missouri
in the US
Studying the effects of sedentary behaviour isn’t easy.
The researchers devised a novel approach: they stopped a group of
very active people from exercising as usual.
They didn’t exactly put them to bed, but nearly.
They got them to cut the number of steps they took each day by at
least half.
The question the researchers asked was will this physical laziness
stop the body from being able to control blood sugar, that being the key
disease-inducing factor for diabetes and heart disease.
Volunteers were fitted with glucose measuring devices so that
their blood sugar could be checked continuously through 24 hours.
They were asked to move about as little as possible but eat
normally.
To examine their basic blood sugar control, these healthy people
were told they could walk and exercise as normal for three days.
During these three days their blood sugar didn’t spike at all
after eating, a sign that they had perfect control over their blood sugar and
they were ideally sensitive to insulin.
For the second part of the experiment, the volunteers became
virtually sedentary and the time spent exercising fell to about three minutes.
The results were illuminating.
During those three inactive days, blood glucose levels spiked
after every meal (loss of blood sugar control) with the peaks being 25% higher
than during active days.
There’s more, the peaks grew each successive day.
In other words, blood sugar went more and more out of control, the
longer the subjects remained inactive.
So, what if I’m laid up for a time because of an illness, will my
blood sugar soar out of control?
No, not if your bed rest is transient and you get back to a life
of activity and exercise.
But – if being inactive is your way of life, this experiment shows
the knock-on effect is your insulin loses its effect and you’re on the slippery
slope to ill health.
You’ve got to get up and move!
Daily Mirror 21 st Oct 2012 Read More
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