Responses of tree planters to an extensive health questionnaire administered several times throughout a planting season have been correlated with objective measures of health status and fitness. These measures included continuous heart rate records measured during work; and pre-and post-work measures of serum enzyme activity, plasma norephinephrine (NE) and epinephrine (E) concentration, and blood cholinesterase activity (also measured serially). Video monitoring of work patterns of experienced and inexperienced workers complemented the physiological and biochemical measures. Preliminary evidence has also been gathered on the susceptibility of tree planters to the effects of pesticides with which they may come into contact through hanging seedlings.
FRDA Research Report 127 (884 KB)
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Updated July 24, 2015