‘Pink Noise’ May Hold The Secret To Deeper Sleep

Though I’ve had insomnia for years, I’ve managed to find some tools to help me stay asleep at night.

Clock-blocking”, getting out of bed when I can’t get back to sleep, and even enjoying a morning stroll have all helped me recover from my 3am wake-ups.

So, too, does my Bluetooth eye mask, which allows me to play “white noise” as I slumber.

But speaking to HuffPost UK, sleep expert Dr Deborah Lee from Doctor Fox (who’s paired with Bed Factory Direct) said it shouldn’t be the only sound in my arsenal.

“Certain types of background noise, also known as coloured noise, can actually improve sleep quality, reduce overnight disturbances and also help you fall asleep quicker,” she told us.

One of those is “pink noise”, which the doctor revealed is best for deep sleep and even memories.

What is pink noise?

I’ll admit I’d never heard of the noise until Dr Lee told me about it.

But it turns out it’s a pretty technical term: pink noise, also known as 1/f noise, fractional noise, or fractal noise, contains all audible frequencies.

Though white noise offers the same range, pink noise decreases the intensity of sound at a rate of three decibels per octave.

Basically, that means “pink noise is a slightly deeper version of white noise,” Dr Lee said.

“An example of pink noise would be rustling leaves or ocean waves – some sounds that people find extremely relaxing.”

The doctor added: “Pink noise has been shown to enhance deep sleep, but also improve memory.”

A 2020 paper found that participants who listened to an increasingly quiet pink noise machine while falling asleep not only nodded off faster, but slept deeper.

Research from 2022 also suggested that older adults who fell asleep saw an increase in slow wave sleep, linked to memory consolidation.

What are some types of pink noise I can listen to at night?

You can find pink noise playlists or even buy a pink noise machine (though they’re harder to find than white noise options).

“Everyone’s brain responds differently to sounds,” Dr Lee said. “However, what is clear is that the right kind of noise, when used consistently, can make a huge difference in not just getting to sleep, but staying asleep too.

“It’s worth playing around with different sounds to find the right sound for you, as not everyone will have the same response.”

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Keep Getting Running Injuries? The ‘UHBE’ Test Could Reveal Why

You may already know how many sit-ups and push-ups you’re meant to be able to do by age and gender, as well as how long you’ll ideally be able to hold a plank or stand on one leg.

These can measure everything from your biological age to your dementia risk.

But what about your balance and stability – factors Harvard Health says can influence your risk of falling and injury, and which are key to pain-free running?

The key to ensuring those are in the best possible nick, they add, is strengthening your core (a group of muscles that extends far beyond the six-pack abs you may associate with a strong core).

As it turns out, the best way to test your core strength also seems to reveal the strength of your hip flexors too – all key muscles to prevent running injury.

Try a unilateral hip bridge endurance test (UHBE)

A 2016 paper sought to find the best way to measure core strength at a clinical level.

The scientists assessed two common core stability tests: the trunk stability test (TST) and the unilateral hip bridge endurance test (UHBE).

The TST is essentially a push-up test. It asks participants to lie face down on the ground and push their body up with their hands planted on the floor.

Their back, shoulders, and knees should not sag or dip. This test is scored from 0-3, with 0 meaning they failed to complete the move and had pain (3 is a perfect, pain-free push-up).

The unilateral hip bridge endurance test asks people to lie down flat and lift their hips up from the surface they’re lying on, lifting one leg.

They are asked to keep their hips straight, avoiding dipping up buckling, for about 10 seconds. Pain, inability to complete the move to the full 10 seconds, and not feeling the move in your glutes can all be signs of issues.

Researchers found that compared to the TST, the UBHE test seemed to be far better at gauging your core strength, especially as it relates to your lower body.

It’s also a great way to assess your glute and hip strength, and because it’s a unilateral move, you can see whether one side is weaker than the other.

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How can I improve my core and hip strength?

Ironically, the move UBHE test emulates – a single-leg hip bridge – can help to grow and stabilise your lower core and hip flexors.

Trying a front plant with a banded hip extension or trying a standing knee lift can also help, Runner’s World says.

Harvard adds that something as mundane as housework and gardening can strengthen your key stability muscles too.

Whichever weakness or imbalance you need to address, though, the UBHE test may be an underrated way to find out about it in the first place.

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