disruption of rythyms

• Shift work = desynchronization of the rytyms and adverse cognitive and physiological effects 

  • as working during a circadian trough (between 12-4 am) where cortisol and core body temp is at their lowest, can risk job performance and well-being 
  •  working at night and sleeping during the day is the reverse of natural rhythms and out with exogenous zeitgebers, difficult to sleep during the day because of light and social cues and noise (sleep deprivation)
  • 3 x likely heart disease as a result of stress from adjusting to sleep wake cycles Krutsson et al,  Martino kidney disease links
• Travel results in a phase delay or advance This can result in jet lag, due to the desynchronisation of bodily rhythms, due to the capacity of the supracharistmas nucleus one day is needed to adjust to one hour of time change (Winters et al, 2008)

  • The symptoms of jet lag include nausea, insomnia and mild depression, which can all affect performance