manta — Biohacks backed by science for health and fitness

7/10 people have difficulty sleeping at least one night per week (1). If you are reading this article then chances are you do too.

A good night’s sleep is one of the most important things you can do for your overall health, arguably more important than diet or exercise. Poor sleep has been linked with a range of health problems including weight gain (2), heart disease (3), increased risk of infection (4), diabetes (5), reduced sex drive (6), memory problems and Alzheimer’s (7), cancer (8), depression (9) and ultimately death (10)!

This article outlines various methods which have been shown to improve sleep. Unfortunately there is no one-size-fits-all solution however experimenting with various approaches below should help you get a better nights rest.

Fix your diet

Avoid sugar

High sugar intake has been associated with lighter, less restorative sleep and more awakenings during the night (11). This can lead to a viscous cycle, when people are tired from lack of sleep, they tend to crave more junk food, so the cycle repeats (12). Try to avoid foods high in refined
sugar, especially before bed.

Avoid spice

Spicy food may also be a culprit in keeping you awake. Not all spicy food is to blame (some spices may help promote sleep) but chili and mustard have been shown to raise body temperature, which is the enemy of sleep.

The active ingredient capsaicin is the culprit (13). In addition too much spicy food can cause gastric disturbance, indigestion and can leave you feeling restless throughout the night.

Avoid alcohol

A glass of red wine might make you feel sleepy, and indeed alcohol can help people to fall asleep but several studies have shown alcohol reduces REM sleep. REM sleep is the stage of sleep when you are dreaming, and it is thought to be the restorative phase of sleep.

Alcohol also causes dehydration, and releases toxins into the body which can make you feel even worse in the morning.

In one study as little as one drink was shown to impair sleep quality. Moderate alcohol consumption lowered restorative sleep quality by 24% and a high alcohol intake by as much as 39% (14).

Change your behavior

Eliminate screens

Cell phones, television screens and computers all emit blue light. Blue light has been shown to reduce our body’s natural production of the sleep inducing hormone, melatonin.
A study of screen use before bed found screens emitting more blue light led to poorer sleep outcomes (15).
If you need to use a screen before bed,
try to activate the blue light filter, or wear
blue blockers (described below).

Try meditation

Is a racing mind keeping you up at night? Oftentimes when we lie in bed we start replaying the days events or we start worrying about the future.

Meditation helps focus the mind on the present, it helps us acknowledge and realize the thoughts and emotions which are causing us stress and anxiety.

It has been shown that meditation helps slow breathing and lower the heart rate (16), both of which help the body relax and fall asleep. Mindfulness meditation has been shown to be an effective way to promote sleep (17).

If you are new to meditation I suggest using a guided meditation, you can find a number guided meditations on YouTube or through apps such as Headspace, or Waking Up.

Read a book

Reading, like meditation refocuses the mind away from stressful thoughts and anxieties.

One study showed that reading a book for only 6 minutes reduced stress levels by 68% (18), which was more than listening to music, drinking tea or going for a walk.

Reading is also a good substitute for television and social media, which have been shown to expose viewers to blue light which is responsible for keeping them awake.

Change your environment

Reduce lighting

When humans are exposed to blue light, the body ceases to produce melatonin. This can disrupt the body’s natural sleep cycle, otherwise known as the circadian rhythm. Exposure to blue light signals to the body that it should be awake. In one study exposure to even a dim light at night
was associated with decreased total
sleep time and sleep efficiency (19).

At least 2 hours before bed try to turn off as many lights as you can, use dim bulbs where possible and when sleeping try to eliminate all sources of light (cover any light coming from digital displays) and use blackout curtains if you have light coming from the window.

Control the temperature

A small change in temperature can have a drastic impact on sleep quality. A cooler environment can help promote sleep.

Interestingly when humans sleep our CORE body temperature drops, but our skin temperature actually increases. This happens because higher
skin blood flow helps helps cool the body.

One way to lower your core body temperature is to lower the temperature in your bedroom, also avoid strenuous exercise before bed. if you want to take it to the extreme, you can go to bed wearing nothing but socks and gloves! This can actually help lower your core temperature as it will stimulate the body to push blood to your extremities to stay warm, this will increase your skin temperature while cooling your core, it may look strange but it works.

Eliminate abrupt noise

Environmental noise is a significant cause of sleep disruption, the WHO published guidelines in 2009 stating that annual average night noise exposure should not exceed 40 decibels, similar to a quiet street in a residential area. Anyone exposed to higher levels than this is at risk from
adverse health effects (20).

Try to eliminate sources of noise where possible, if this can’t be done try earplugs or play some white-noise, white noise (as opposed to abrupt noises) can actually help calm the mind and promote restful sleep.

Try supplements

Melatonin - For jetlag

Melatonin is a hormone found naturally in the body, the primary responsibility of this hormone is to regulate our sleep-wake cycles. Melatonin levels rise in the body when darkness occurs, causing us to feel sleepy. Melatonin levels stay elevated during the night and fall to almost zero during the day.

One of the causes of jetlag is a disruption in the sleep-wake cycle. If jetlag is making it difficult to fall asleep then taking a melatonin at bedtime can help shift the sleep cycle earlier. Inversely if jetlag is causing you to wake early, taking melatonin upon waking can help you fall back to sleep and will also shift your sleep cycle later. The same is true for shiftworkers with disrupted sleep cycles.

Studies have shown melatonin can be an effective treatment to adjust the timing of sleep cycles in those affected by jetlag (21), and possibly for the treatment of insomnia. As a generic sleep aid for someone not experiencing jet lag or sleep cycle disruption melatonin has not been shown to be effective.

Glycine - For those looking for a mental boost

Glycine is an amino acid which your body uses to create proteins, the body naturally produces glycine from other amino acids and Glycine is found in protein rich foods. Glycine is also available as a dietary supplement.

It is believed Glycine induces sleep by reducing core body temperature, it does this by dilating the blood vessels in the periphery of the body, which results in heat loss (22). During a normal sleep cycle, sleep usually occurs when our core temperature is dropping, as it would after glycine supplementation.

Glycine has been shown to not only improve sleep quality but as a bonus it has also been shown to improve feelings of daytime sleepiness and improve performance of memory recognition tasks (23).

Valerian root - For the light sleeper

Valerian is a herb which is native to Europe and Asia, an extract of the root of the plant is commonly sold as a dietary supplement to promote sleep. Valerian has been used as a medicinal herb to since Ancient Greece.

Many of the studies on valerian remain inconclusive and the exact mechanism by which valerian has its effects are not fully understood. It is believed that Valerian acts on the GABA receptors in the brain, similar to benzodiazepines (a commonly prescribed class of drugs for sleep and anxiety) (24).

A recent meta analysis of the various studies examining valerian as a sleep aid concluded that valerian might improve sleep quality (25).

Try these wearables

The Manta Sleep Mask takes it to a new level

Eye mask & earplugs

Noise and light can be very detrimental to sleep quality. Even if we are not fully woken background noise or residual light from a street lamp, clock radio or even the morning sun can significantly lower sleep quality. One study of patients in an intensive care unit showed that the use of earplugs and eye masks resulted in significantly more REM sleep, less
awakenings and elevated melatonin levels (26).

Blue light blockers

Our bodies natural sleep cycles (the circadian rhythm) is regulated by the production of melatonin in the human body.

Studies have shown that melatonin production is suppressed when humans are exposed to blue light. In the natural world this makes sense, the sun goes down and the human body starts producing melatonin which helps induce sleep. Unfortunately today we are surrounded by artificial lighting which inhibits our bodies natural production of melatonin. In addition some studies suggest a link between exposure to light and an increase risk of cancer, diabetes, heart disease and obesity (27).

Wearing blue light blocking glasses in the evening for a few hours before bed is one way to fool the brain into producing melatonin again. Wearing glasses in the evening may look strange but it’s probably a better option than lighting your whole apartment like a brothel.

RECENT

14 ways to improve your sleep