Hormonal Changes In Satisfied And Dissatisfied Shift Workers Across A Shift Cycle, ScienceDaily Bookmark and Share

Excerpts: There is ample evidence that shift work, including night work, increases the risk (...) and it is believed that the main cause of the increased illnesses is due mainly to the disruption of sleep/wake behavior and the resulting conflict with the circadian system. The results suggest that dissatisfaction with the shift system is related to lower testosterone levels, and that the latter are related to disturbed sleep/wakefulness and an increased need for sleep and recovery. In addition, working an entire shift cycle was related to a decrease of morning cortisol, which may relate to an adaptation to long-term stress.