Benefits of sleep

Getting enough good-quality sleep isn’t just about feeling refreshed the next morning, it’s a foundation for a person’s physical and emotional wellbeing. Sleep is an essential biological process that helps the body repair, restore, and prepare for the day ahead. ^{Footnote [1]}  

Sleep debt, or sleep deficit, is the gap between how much your body needs and how much you actually get. If you fall short regularly, even if it’s only by an hour or two, that lost sleep can accumulate over time.

Think of it like a ‘sleep overdraft’, each night of too-little rest adds to the balance your body is trying to repay. For example, if you need eight hours of sleep but have only managed four, you’ve built up a four-hour sleep debt. 

The NHS recommends 7 to 9 hours a night. ^{Footnote [2]} This does vary depending on your age, lifestyle and health. Those who have active lifestyles or have high stress might need more time to recover. But it isn’t so much about how much sleep you get, but instead more about the quality of sleep.

Sleep can play an important role in keeping both your mind and body running smoothly. Even small improvements to your sleep can make a great difference to your health.

It strengthens your physical health

During sleep, your body releases hormones that support growth, tissue repair and immune function. These processes help keep your muscles strong, your energy levels steady, and immune system ready to protect you. Getting poor or insufficient sleep over time can increase the risk of conditions like, high blood pressure and diabetes. ^{Footnote [2]}  

It boosts your brainpower

Sleep helps play a role in how we learn, think and remember. While you sleep, your brain is busy processing information, filing away memories, and clearing out the waste that builds up during the day. This can be essential for supporting clarity and focus. ^{Footnote [3]} Without enough sleep, you might find that your concentration, your reaction times and decision-making can take a hit, making your everyday tasks feel more difficult.

It supports your emotional wellbeing

Just one poor night’s sleep can make stress and emotions harder to manage. Ongoing sleep problems can affect a person’s moods, resilience, and overall mental health. Over time, lack of sleep can contribute to anxiety and depression. ^{Footnote [2]}  

Mental effects of sleep deprivation

There are many potential risks to your mental health because of sleep deprivation.

1. Low mood and irritability
   Lack of sleep can create an impact on your emotional balance, making you feel more irritable, down, or emotionally sensitive. Poor sleep can be linked with lower moods and increased irritability. ^{Footnote [2]}  
2. Increased risk of anxiety and depression
   Ongoing poor sleep acts as a major risk factor for developing mental health conditions according to NHS guidance. ^{Footnote [2]} 
3. Difficulty concentrating
   Sleep deprivation can also affect your ability to focus, think clearly and make decisions. NHS sources highlight problems with concentration, memory and effect on your overall mental clarity when sleep is consistently poor. ^{Footnote [2]} 
4. Emotional reactivity
   Lack of sleep can leave you feeling a bit grizzly, and it can also make you more reactive to stress and negative emotions. This can lead to a reduction in your ability to cope with daily challenges, as well as amplify feelings of frustration.

Does sleep affect heart health?

Sleep can play an important role in protecting your heart. When you don’t get enough of it, your heart can feel strained. Regularly sleeping fewer than seven hours can make the heart work harder than it should. Over time, constant pressure can put extra stress on your arteries and increases the likelihood of developing heart disease, heart attack or stroke.

Does sleeping boost the immune system?

Yes, sleep can boost the immune system. When you get enough good-quality sleep, your body strengthens its immune defences. Healthy sleep supports the immune system by helping it perform vital functions such as repairing tissues, removing waste from cells, and activating the immune responses that help protect you from infection. ^{Footnote [3]}  

There are many things you can do to help you get a more restful night. Our top five include:

1. Completing repetitive tasks, like counting sheep, reading or puzzles can help you wind down quicker.
2. No screentime, avoiding blue light can help the production of melatonin, the hormone that helps regulate sleep.
3. Sticking to a routine, like setting a bedtime or doing a nightly ritual such as skincare.
4. Watch what you eat or drink, avoiding heavy meals, alcohol and certain snacks. 
5. Invest in your wellbeing, using sleep aids like scented pillow spray or soundscapes could help ease you to sleep.

There are another five for you to discover. To find out more check out our article about the top tips for better sleep.