“…Lack of sleep, poor sleep quality, long working hours, long-term job, work outside of biorhythms, insufficient rest between work periods, excessive workload, noise, heat, vibration, the difficulties with movement, dehydration, boring or repetitive work, time and climate zones change, inaccessible medical professionals, irregular sexual life, social exclusion and others leads to chronic fatigue, poor work performance, decreased safety, increase in chronic disease and depression risk (1). Wadsworth et al (2008) established links between seamen work characteristics and experiences of fatigue and sickness. There is a positive correlation between fatigues experience and cognitive weakness, psychological distress and general health (2).…”