Health and Safety Implications of Diurnal Variability in Tolerance to Stress

摘要

The productivity of women-workers was studied in a company manufacturing electronic equipment. The workers worked in three weekly rotated shifts, covering a 24-hour period: the morning shift (06:00 - 14:00), the afternoon shift (14:00 - 22:00) and the night shift (22:00 - 06:00). The afternoon shift's productivity was relatively highest (102.1%) and that of the night shift lowest (97.2%). The greatest differences in shifts' productivity were noticable on the first two days of the week when the night shift was least productive; later in the week there were no significant differences in shifts' productivity. The work output of the relatively most productive workers in the night shift increased during work in the night shift faster over the week than of the least productive ones.