Shift work presents unique challenges rooted in the human circadian rhythm, which dictates sleep cycles influenced by light. Dr. Sandra Dorman, director of the Centre for Research in Occupational Safety at Laurentian University, emphasizes that humans are naturally wired to be awake during daylight hours and sleep after dark. Most daily activities typically occur between 6 a.m. and 10 p.m.
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Fatigue emerges as the primary short-term health risk associated with shift work, leading to increased workplace injuries, as Dorman explains. The long-term implications also involve a correlation between insufficient sleep, unhealthy dietary habits, and higher risks of obesity, cardiovascular disease, and cancer.
Mental health is equally affected, with Kristy Cork, a healthy workplaces consultant at WSPS, noting a rise in depression and anxiety among shift workers. This often results from sleep deprivation, which can impair individuals' resilience to daily stressors. Additionally, working irregular hours can disrupt social connections, contributing to feelings of isolation.
Dorman and Cork agree that establishing a healthy sleep pattern is crucial for mitigating both physical and mental health risks associated with shift work, as well as preventing fatigue-related incidents in the workplace. While employees can take steps to improve their health through adequate sleep and nutritious eating, the responsibility also falls on employers to implement supportive measures.