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2010-07-16 08:33:18
UK researchers say they have uncovered why women who often wear high heels can
find it painful to wear flat shoes.
Scans of the calf muscles in a group of frequent heel wearers found muscle
fibres were, on average, 13% shorter than in those who avoided high heels.
The Journal of Experimental Biology study also found high heels led to stiffer
tendons in the calf.
Some time spent in flatter footwear as well as stretching exercises would help
to combat the effect, experts said.
Anecdotally it has long been said that regularly wearing high heels shortens
the calf muscle.
Study leader Professor Marco Narici, from Manchester Metropolitan University,
said in the 1950s secretaries who wore high heels complained that they
struggled to walk flat-footed when they took their shoes off.
But no one has looked at what is actually happening in the muscle.
From a group of 80 women, the team selected 11 volunteers who had regularly
worn 5cm heels for two years or more and who felt uncomfortable walking flat
footed.
An MRI scan showed that there was no difference in the size of the calf muscles
in the heel wearers compared with a group of women who wore flat shoes.
But an ultrasound scan revealed that the muscle fibres were indeed shorter in
the women who wore heels.
Stiff calves
When the women were asked to lay on their front on a couch, the researchers
noticed that the angle of the heel in the stiletto wearers was greater due to
their shortened calf.
In the final part of the study, they found that the high-heel wearers' tendons
were much thicker and stiffer than in those who stuck to flat shoes.
This causes discomfort when walking on flat feet because the tendon cannot
stretch sufficiently, Professor Narici said.
Yet he does not think women need to give up their high heels.
Continue reading the main story
Start Quote
The advice we would give is not to wear heels or flat shoes all the time but to
wear a variety of heel heights
End Quote Sammy Margo Physiotherapist
"Fashion is intended to be uncomfortable and none of the women in the study
planned to give up their high heels," he said.
"We want to give practical advice and I would recommend just doing a few
stretching exercises to counteract some of these changes."
He said one useful tip was for high heel wearers to stand on tip toes on a
step, and using a handrail for balance to lower their heels as far as they can
before raising them up again.
Sammy Margo, physiotherapist and spokesperson for the Chartered Society of
Physiotherapy, said the study backed what they suspected.
"The advice we would give is not to wear heels or flat shoes all the time but
to wear a variety of heel heights to get the calf muscles working through the
greatest range of movement.
"But I can't say we are seeing a higher incidence of calf problems in women who
wear high shoes."