Chernyuk V. I., Bobko N. A., Kudiyevsky Ya. V.
SPECIFIC FEATURES OF FATIGUE FORMATION IN DAY AND NIGHT 12-HOUR SHIFTS IN ENGINEERS-ELECTRONICS OF AUTOMATED AIR TRAFFIC CONTROL SYSTEMS
SI "Institute for Occupational Health of NAMS of Ukraine", Kyiv
Full article (PDF), RUS
Purpose of the study. To reveal specific features of fatigue formation in day and night 12-hour shifts by psychological and psychophysiological indicators in representatives of high safety demand profession on the example of engineers-electronics of automated air traffic control systems (AATCS).
Materials and methods. 47 AATCS engineers at the civil airports of Ukraine (work tension – class 3.2) had been examined in first and last hours of working shifts by a set of tests on self-feeling, activity, mood, situational anxiety by Spielberger-Khanin, a proof test with Landolt rings, red and black tables, short-term memory on numbers and figures.
Results. The classic indicators of fatigue were revealed in workers over 12-hour working shifts: decrease in activity, deterioration in self-feeling and mood (p < 0,0001) under preferential decrease of indicators in self-feeling and activity, especially in night shifts (p < 0,0001); worsening both short-term memory on figures (p < 0,02) and switching the attention (p < 0,007) in day shifts; decrease in professional reliability (increase in anxiety (at night – p < 0,0003, in the day – p < 0,009). At night shifts against the background of deeper development of fatigue (significantly greater increase in anxiety and decrease in activity and self-feeling in comparison with mood (p < 0,02) signs of formation of overfatigue were revealed in AATCS- improving the efficiency of information processing, requiring concentration of attention to the end of the shifts, as compared with its initial level (p < 0,002 ....0,03).
Conclusion. More deep development of unfavorable changes in the continuum of functional body states "fatigue–overfatigue" were revealed in 12-hour night shifts as compared with day ones. The signs of overfatigue formation in 12-hour night shifts point to unacceptableness of extended night shifts, when consider professional reliability and health maintenance of AATCS engineers.
Key words: shift work, mental activity, fatigue, overfatigue
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