The science behind sensory deprivation tanks
Find out everything you need to know about float therapy.
Float tanks and sensory deprivation tanks are all the rage, but what are their benefits and do they work? We sat down with GP Dr Michela Sorensen, opens in a new tab to get the lowdown on this health trend.
What is a sensory deprivation tank?
Sensory deprivation tanks – also known as float tanks, floatation tanks, isolation tanks and restricted environmental stimulation therapy (REST) tanks – are filled with skin-temperature water (approximately 35C) and Epsom salt (a compound of magnesium and sulphate).
The tank is dark and soundproof, and the high salt content makes it easy to float on your back. A float tank session generally lasts an hour.
“Sensory deprivation tanks work by removing any form of stimulation from the surrounding environment which is thought to induce deep relaxation both physically and psychologically,” explains Michela. “This state of deep relaxation is thought to improve a variety of conditions.”
The benefits of using a sensory deprivation tank
Sensory deprivation tanks are believed to improve a range of physical and mental health conditions, including:
Stress, anxiety, opens in a new tab and depression
Muscle tension and fatigue
Pain
Sleep, opens in a new tab quality
Mental focus
“There is certainly some scientific research behind the claims of a variety of health benefits associated with sensory deprivation tanks, particularly when it comes to managing anxiety and improving muscle recovery, concentration and pain management,” says Michela. “However, most of these studies are quite small and involve a very limited snapshot of the population. So, while the early evidence is positive, it’s an area that needs further research.”
Impacts on the brain
Sensory deprivation tanks are purported to enhance creativity, but more research is needed to demonstrate the veracity of these claims.
Impacts on stress and pain
The deep state of physical and mental relaxation brought on by floating in a sensory deprivation tank is believed to be responsible for the reported decrease in stress, opens in a new tab and physical pain.
What to expect when using a sensory deprivation tank
You will be asked to shower before your float to keep the tank sterile. Floating nude is recommended, but you may choose to wear earplugs to keep the salty water out of your ears. You can choose to leave the lid of the tank open or close it.
It may take you a while to relax, but taking deep breaths can help you settle in. You’ll be advised when your session is over and you’ll need to have another shower to rinse off the salt.
Is it right for you?
Float tanks are generally considered safe for healthy people over the age of 16, but those with chronic health conditions should seek medical advice before using one.
“People who have a history of hallucinations, claustrophobia or any form of heart disease should see their doctor prior to using these devices,” says Michela. “Anyone with a background of seizures should also have a thorough medical review beforehand.”
Please note: The tips throughout this article serve as broad information and should not replace any advice you have been given by your medical practitioner.
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Dr Michela Sorensen
Dr Michela Sorensen is a GP who is passionate about women’s, mental and rural health. She believes access is the biggest barrier we have when it comes to our health, and is a strong advocate for change in this area. In her spare time, Michela enjoys baking... and eating most of the mixture before it actually makes it into the oven.