Cardiovascular and muscular strain during a tree planting season among British Columbia silvicultura workers

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      <subfield code="a">Cardiovascular and muscle strain were determined in 16 British Columbia reforestation workers during a period of tree planting (75 days). Serial data collected from each worker included pre- and post-work blood chemistry on the first day of the work shift; working heart rate (HR), a PWC 170 fitness test, and a daily diary of an individual's work-rest schedule</subfield>
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      <subfield code="g">Vol. 36, nº 8, August 1993 ; p. 935-949</subfield>
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