Electromyographic activity during typewriter and keyboard use

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      <subfield code="a">This study investigated how ergonomic design influences neck-and-shoulder muscle strain, through keyboard assessment. Muscular activity was measured electromyographically from six muscles in the forearm and shoulders of eihgt experienced typists using each of five different types of keyboard</subfield>
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      <subfield code="t">Ergonomics</subfield>
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      <subfield code="g">Vol. 37, nº 3, March 1994 ; p. 477-484</subfield>
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