Quality Sleep and the Importance of Our Body Clock

One of the most important steps towards healthy ageing is having a consistent, good-quality sleep routine that works in harmony with our circadian rhythm.

In simple terms, the circadian rhythm is our body's biological clock. Working in a cycle of approximately 24 hours, this system influences many processes, from sleep and hormones to digestion and body temperature.

Daylight is its most important guide. The first light of morning reminds our bodies that it is time to wake up, while evening darkness signals that it is time to begin preparing for sleep.

Living in harmony with our body clock therefore matters not only for a good night's sleep, but also for our overall health.

What Happens in Our Bodies While We Sleep?

While we sleep, our bodies are actually very busy. They continue recovering, renewing themselves and preparing for the next day. Our immune system, cellular and tissue repair processes, and hormonal system all continue their work.

Melatonin, which helps protect our cells against oxidative stress through its strong antioxidant properties and plays an important role in regulating the sleep–wake cycle; leptin, which helps regulate hunger and fullness signals; and growth hormone, which supports tissue repair and the maintenance of muscle and bone health, all have important roles in these processes.

What Happens When Our Sleep Routine Is Disrupted?

Insufficient and irregular sleep adversely affects our hormonal balance. The timing of melatonin release and the daily rhythm of cortisol may be adversely affected.

The balance between ghrelin, known as the hunger hormone, and leptin, the fullness hormone, also changes. These changes can often increase our appetite and make us more drawn to carbohydrate-rich and energy-dense foods.

Long-term insufficient sleep can adversely affect blood sugar regulation and insulin sensitivity, potentially increasing the risk of insulin resistance and type 2 diabetes. Poor sleep quality may also affect the normal pattern of growth hormone secretion. Over time, this can make tissue repair and the preservation of muscle mass more difficult.

Long-term insufficient sleep is also associated with an increased risk of high blood pressure and cardiovascular disease. In addition, we can feel tired and low in energy, and find it difficult to concentrate.

Quality sleep is therefore essential not only for starting the next day feeling rested, but also for protecting our long-term health and ageing well.

One of the most important steps in supporting our longevity journey is listening to our body's biological rhythm and making sufficient, good-quality sleep a priority.