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Incorrect methods of wedging large pieces of
clay may cause injuries, especially to the back.
Damage may occur after a period of several years.
When wedging you should be well aware of your
capabilities of lifting a piece of clay, remembering
that this weight has to be maneouvered at least 21
times before it is wedged. Back and stomach muscles
are strained if the weight is too heavy. Secondly, the
hands should be released from the piece of clay on
the downward movement, just before it makes contact
with its other half, otherwise the sudden curtailing of
momentum at table level creates jarring tremor which
is transferred through the body via the hands, the
latter of which acts as a lever and jerks the spine.