Night work: a profound impact on health
Scientific research has shown a direct link between night work and cardiovascular disease and cancer
More and more people are forced to work night shifts, sacrificing their circadian rhythm for work needs. But what are the consequences of this choice on our health? The scientific studies are clear: working at night significantly increases the risk of developing various diseases, including diabetes, obesity and cardiovascular disease.
Why does our body suffer?
Our body has an internal biological clock, known as the circadian rhythm, which regulates a myriad of bodily functions, from sleep to hunger and body temperature. This watch is synchronized with the day-night cycle, thanks to the alternation of light and dark. When we work at night, we disrupt this delicate balance, generating a series of physiological imbalances:
- Hormonal changes: Disruption of the circadian rhythm alters the production of key hormones such as melatonin, the sleep hormone, and insulin, which regulates blood sugar levels
- Sleep disorders: Difficulty sleeping during the day and exposure to artificial light at night worsen the quality of sleep, essential for rest and recovery of the body
- Metabolic deficits: The alteration of circadian rhythms can affect metabolism, favoring fat accumulation and the onset of insulin resistance, a precursor to type 2 diabetes
- Increased stress: Working at night causes chronic stress to the body, which can weaken the immune system and increase susceptibility to infections
The long-term consequences
The impact of night work on health goes far beyond mere fatigue. Scientific research has shown a direct link between night work and:
- Cardiovascular disease: Hypertension, heart attacks and strokes are more common in shift workers
- Cancers: Some studies suggest a possible increase in the risk of developing certain types of cancer, particularly
The long-term consequences
The impact of night work on health goes far beyond mere fatigue. Scientific research has shown a direct link between night work and:
- Cardiovascular disease: Hypertension, heart attacks and strokes are more common in shift workers
- Cancers: Some studies suggest a possible increased risk of developing certain types of cancer, particularly hormone-dependent cancer
- Mood disorders: Depression and anxiety are more common in night workers, due to stress and difficulty maintaining social relationships
- Gastrointestinal problems: Ulcers, esophageal reflux and irritable bowel disorder are more common in shift workers
What can we do?
Night shifts are a health challenge, but not a condemnation. Understanding the mechanisms behind these adverse effects and taking preventive measures can minimise risks and improve workers’ quality of life.
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