In the quest for optimal health, one often overlooked yet crucial factor is the balance of our circadian rhythms. This internal clock regulates our sleep-wake cycle. In this article, I want to shed light on the profound impact of circadian rhythms on our brain, health, and productivity, drawing upon research from leading institutions to underscore the significance of prioritising quality sleep.
Circadian rhythm is a person’s innate sense of time, the ‘biological or master clock’ that determines our every action throughout the day. It detects light levels through your eyes and then tells the brain to make more or less melatonin, the hormone that makes you sleepy. Every one of our 20,000 genes is programmed with this master clock, relying on it for vital processes. These include regulating internal body temperature and hormone production and intertwining with metabolic processes.
Firstly, let’s understand the key difference between insomnia and poor sleep. While they are both related concepts, they differ in their severity and persistence.
Poor sleep refers to general disruption or dissatisfaction with one’s sleep patterns. Sometimes considered social jet lag, it is often self-inflicted due to poor sleep hygiene or lifestyle choices. It is usually temporary.
Insomnia, on the other hand, is a specific sleep disorder. It is characterised by persistent difficulty falling asleep or staying asleep despite adequate opportunity for sleep. This leads to significant distress or impairment in daytime functioning and is often stress-related.
Despite its paramount importance, many people fail to grasp the critical role of sleep in maintaining overall health. Research from the University of Oxford highlights widespread misconceptions about sleep, with a lack of awareness contributing to poor sleep hygiene, insomnia, and subsequent health consequences. From increased risk of chronic diseases to impaired cognitive function, the ramifications of sleep deprivation are far-reaching and profound.
A study published by the Department of Anaesthesiology found that an unbalanced circadian rhythm causes up to 20% of cardiovascular diseases, such as stroke, arrhythmia, and angina. Losing one hour of sleep, for instance, can significantly increase cardiovascular incidents when clocks go forward in spring for daylight saving time. This is compounded by an increase in road traffic accidents related to sleepy drivers.
The economic toll of poor sleep and insomnia on the British economy is staggering. Studies from the Sleep Council estimate that sleep-related issues cost the UK economy an estimated £34 billion annually in lost productivity and absenteeism . Moreover, research from the London School of Economics underscores the link between insufficient sleep and decreased workplace performance, highlighting the urgent need for interventions to address this pervasive issue.
What can individuals do to improve their circadian rhythm and, by extension, their health and productivity? Simple lifestyle modifications can make a world of difference to those with insomnia. Establishing a consistent sleep schedule is the starting point. Regularity is crucial for insomnia management. Try to wake up and go to sleep at the same time every day—even on weekends.
Get some exercise during the day. At least 30 minutes outdoors allows your eyes to absorb daylight, rebalancing the circadian rhythm and reprogramming the master clock.
Next, create a conducive sleep environment by reducing the room temperature to 18 degrees Celsius. A warm bedroom slows down the likelihood of falling asleep.
If you struggle to fall asleep within 10 minutes, practice relaxation techniques before bedtime. Keep your mobile phone and tablets turned off at least one hour before bed. Try reading a book—nothing too exciting or challenging to the brain.
Finally, leave a gap of at least two hours after eating before going to bed to ensure food digestion. These are all proven strategies for enhancing sleep quality and saying good night to insomnia.
Employers have a crucial role to play in fostering a culture of sleep wellness within the workplace. By offering flexible working arrangements, promoting work-life balance, and providing education on the importance of sleep hygiene, employers can empower employees to prioritise rest and rejuvenation. Encouragement from the workplace is essential—after all, employers are the biggest benefactors of a concentrated brain at work, improving focus and productivity tenfold.
With technological enhancements, many workplaces have adopted a 24/7 availability culture, which is detrimental to our sleep cycle and circadian rhythm balance. Let employees know they aren’t expected to reply to messages in the evening or work during the weekend. Allowing your workforce to align with their natural body clock will boost productivity and foster a better attitude towards work. It all starts with understanding our basic functions, including our circadian rhythm.
In conclusion, the key to optimised health lies in the correct balance of our circadian rhythms. By recognising the profound impact of sleep on our well-being and productivity, we can take proactive steps towards reclaiming our health and vitality. Let’s prioritise quality sleep as a cornerstone of a healthier, happier, and more productive future for all.
Kumud Gandhi is a Nutritional Food Scientist, bestselling Author, Broadcaster, and Motivational Speaker on the subject of nutritional health for productivity and performance in the workplace. In 2010, Kumud founded ‘The Cooking Academy,’ a cookery school focusing on cooking for nutritional health and well-being.
She regularly presents to international audiences on topics such as ‘Eating for Immunity and a Lifetime of Wellness.’ In 2022, Kumud co-founded ‘Your Work Wellness,’ where she is an expert in the field of Wellness in the Workplace. She works with organisations to create transformational change in productivity and performance through wellness strategies, nutrition, and personal health coaching.
[1] University of Oxford. “Misconceptions About Sleep.” Accessed February 25, 2024. https://www.ox.ac.uk/news/2022-10-17-misconceptions-about-sleep-impact-mental-health.
[2] The Sleep Council. “The Economic Cost of Poor Sleep.” Accessed February 25, 2024. https://www.sleepcouncil.org.uk/economic-cost.
[3] London School of Economics. “Sleep and Workplace Performance.” Accessed February 25, 2024. https://www.lse.ac.uk/sleep-and-workplace-performance.
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