Sleep deprivation has emerged as a significant global health concern, affecting populations in countries such as Australia, South Korea, the United Kingdom and the United States. The modern 24-hour society, characterised by constant connectivity, shift work and increased screen exposure, has profoundly disrupted natural sleep patterns.
Epidemiological studies indicate that insufficient sleep is associated with a wide range of adverse health outcomes, including obesity, type 2 diabetes, cardiovascular disease and impaired cognitive function. In South Korea, where average sleep duration is among the lowest globally, public health initiatives have been launched to promote better sleep hygiene.
Australian researchers have extensively studied the effects of blue light exposure from digital devices, demonstrating its impact on melatonin production and circadian rhythms. In the United Kingdom, healthcare providers are increasingly recommending behavioural interventions, such as cognitive behavioural therapy for insomnia (CBT-I), as a first-line treatment.
Chronic sleep deprivation also has significant implications for mental health, contributing to anxiety, depression and reduced emotional resilience. In the United States, workplace productivity losses linked to poor sleep are estimated to have substantial economic consequences.
Experts emphasise that improving sleep health requires both individual behavioural changes and broader societal shifts, including workplace policies and public awareness campaigns. As evidence continues to accumulate, sleep is increasingly recognised as a fundamental pillar of overall health.