At such a tender age, they probably don't know their salamba kapotasana from their trikonasana.

But that hasn't stopped these primary school children benefiting from a spot of yoga.

Weekly lessons in the ancient discipline have helped to improve concentration and even raise academic performance among pupils as young as four, say their teachers.

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© SWNS.comMeditation: A teacher takes school pupils in Essex through some relaxation techniques, which are said to improve concentration levels.

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© MasonsStanding tall: Teachers say yoga has taught the youngsters body awareness.
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The hour-long classes, which include guidance on how to control breathing using meditation techniques, are being trialled at ten infant and junior schools in Essex.

And while the use of a £20,000 Government grant to fund the lessons will doubtless raise a few eyebrows, especially at a time of economic hardship, teachers insist they are having a positive effect.

Angela Hutchinson, head of Bournemouth Park Primary School in Southend, said the yoga classes - arranged by Southend-on-Sea Borough Council - teach children 'how to find their own space', adding: 'They think it's fantastic.'

Helen Reader, the deputy headmistress at Thorpedene Infants' School, in Shoeburyness, Essex, added the classes were having a 'calming' effect.

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© SWNS.comYounger students tackle a simpler yoga pose. The classes have been introduced in a number of schools in Essex.
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Dave Read, 52, one of several instructors helping the children, dismissed the suggestion that bringing yoga into schools was an 'airy-fairy' idea.

The former history teacher said: 'It is ultimately about improving concentration and grades.

'Children are under increasing pressure and this gives them support.'

Yoga dates back around 5,000 years, originating in India, and is aimed at helping people attain spiritual insight and tranquillity.

This is not the first time it has been suggested that the discipline can benefit younger students.

In 2009 Riverside Primary School in Rotherhithe, South East London, scored a 100 per cent pass rate in Sats tests in English, maths and science after pupils were taught breathing exercises by a yoga teacher before the exams.