Do you get enough sleep? Most of us these days don’t get enough sleep, but it’s more important for our health than we realise.
I’ve been reading Matthew Walker’s new book “Why we Sleep”* and it’s very interesting indeed. He points out that it is a recent phenomenon in our human history to be forced to stay awake for longer hours than we want to, whether that’s because of work or social pressures. Somehow sleeping less has come to be seen as better than having the full 7 or 8 hours that we really need. There is plenty of evidence for the negative impacts of loss of sleep on our health, as well as the increased risk of accidents while drowsy and lowered productivity or poor judgement due to tiredness.
Matthew Walker says
“This silent sleep loss epidemic in the greatest public health challenge we face in the twenty-first century in developed nations.”
“… the decimation of sleep throughout industrialised nations is having a catastrophic effect on our health, our life expectancy, our safety, our productivity, and the education of our children.”
He cites inadequate sleep as a causal factor in many big health issues, saying that shortened sleep
“..demolishes your immune system, more than doubling your risk of cancer. … is a key lifestyle factor in determining whether or not you will develop Alzheimer’s disease….. disrupts blood sugar levels so profoundly you would be classified as pre-diabetic…. increases the likelihood of your coronary arteries becoming blocked and brittle, setting you on a path towards cardiovascular disease, stroke and congestive heart failure…. contributes to all major psychiatric conditions including depression, anxiety and suicidality.”
In other words, “the shorter you sleep, the shorter your life span”.
On the one hand, this is all scary stuff, but on the other hand, it’s easy to fix – if you can value your quality of sleep and ensure you get as much as you need then your body and brain will be able to restore your health and energy.
Why do we need sleep each night?
Our bodies function according to a body clock called the circadian rhythm which is hard-wired into us and linked to day/night cycles. All our bodily functions work in a rhythmic cycle throughout the day and night. At night, sleep is not just a passive phase, like switching off the lights, it’s a very active time for the brain.
During the night, we go from light to deeper levels of slumber and back again several times in a repeated pattern. Dreams occur in the lighter phase of sleep and in the deeper dreamless sleep our brains are very active processing our memories and experiences. Each kind of sleep has a purpose. Here’s the important point though – in the early part of the night, before midnight, our sleep is deeper, mostly dreamless sleep but as morning approaches there is more light dreaming sleep. So when we stay up late we miss out on the deep sleep, and when we get up artificially early we miss out on dreaming sleep. There is no way around this since the pattern of our sleep is defined by our inbuilt circadian rhythms. So loosing sleep really is “burning the candle at both ends”!
How to improve your sleep.
Here are some tips for healthy sleep:
- Have a regular sleep schedule – this is the most important tip. Go to bed and get up at the same time each day, even at the weekends, and make sure you have enough bed-time to get your full night’s sleep.
- Being regularly physically active helps you sleep, although not just before bedtime.
- Get some sunlight or at least natural daylight every day. It’s too easy to live an indoor life these days, but natural daylight is key to regulating the bodyclock.
- Things to avoid:
Caffeine and nicotine – these are stimulants which take longer to wear off than you might think,
Alcoholic nightcaps – although you may feel more relaxed, alcohol affects your sleep in negative ways,
Large meals or drinks late at night – when your digestive system is active or if you need to go to the loo that will prevent you sleeping deeply,
Medications that delay or disrupt sleep – if you think your medication is disturbing your sleep discuss this with your GP.
- Don’t take naps after 3pm. Naps are fine to help make up for lost sleep but if you nap later in the day it will reduce your need for sleep at night.
- Relax before bed – it’s not the right time to get last-minute things done, it’s the time to unwind and allow yourself to get sleepy.
- Cool down – a hot bath before bed is recommended because it’s relaxing and more importantly cooling off after you get out of the bath helps you to fall asleep. Keep your bedroom temperature on the cool side – your body temperature needs to drop slightly as you fall asleep.
- Darkness – proper darkness is a rare thing in cities. Street lights are often LED bulbs which are energy efficient but the wavelength of the light encourages wakefulness. Screens on TVs, pcs, phones and other devices are similar – the light will wake you up. Have curtains which really block out external light at night. Turn down or remove all sources of light in your bedroom.
- Gadget-free bedroom. Clocks, phones, tablets etc will either have some light or will potentially disturb you with sounds. Eliminate these as much as possible. You can turn your clock away from you so you can’t clock-watch!
- Pillows and mattresses – be comfortable, well supported but free to adapt your position and coverings as you wish.
- Don’t lie awake – if you can’t fall asleep then get out of bed and do something relaxing. Being anxious about sleep won’t help you sleep!
* Walker, Matthew. Why We Sleep – The New Science of Sleep and Dreams. Penguin Books 2017