What is Floating? Sensory Deprivation Benefits

Floating- benefits of sensory deprivation therapy

Before I had kids, I would daydream about vacations in exotic places… Now, I fantasize about a few hours alone with no one asking me questions or requesting that I make them a snack…

What used to seem like a really boring way to spend time (alone, in a quiet place) now seems like a dream vacation. Don’t get me wrong, I love my kids and the approximately 92,465 questions they ask me daily, but a few hours of quiet really helps me recharge.

I heard about a new trend called floating and decided to give it a try. Floating is actually an old idea called sensory deprivation, but with a new name and optimized for several health benefits.

What is Floating?

As you may have gathered by the name, it involves floating in a pod or room that is designed for short term sensory deprivation. This is typically done within a large tank of super-saturated magnesium water that makes you completely buoyant.

Float tanks are also called Isolation tanks or Sensory Deprivation Tanks. While they sound like something out of an old-school war movie, they have recently gained popularity among elite athletes, those who struggle with stress, and people with various health problems.

On a practical level, floating is typically done for 90 minutes or more in body-temperature salt water in a room devoid of light and sound.

Why is Floating Beneficial?

The basic concept is that floating reduces external stimuli as much as possible to help the body achieve a natural restorative state. Some people compare the experience of floating to meditation or yoga.

Tanks specifically designed for sensory deprivation or floating were created in the 1950s but gained popularity in the 1970s when it became known as Restricted Environmental Stimulation Therapy (or REST). Dr. John Lilly, a neuroscientist who worked for the National Institutes of Health and specialized in cognition and brain activity helped pioneer the research during this time.

Since then, floating has been used for a variety of reasons, both anecdotal and scientifically backed:

  • Stress reduction
  • Anxiety relief
  • Sports recovery
  • Pain relief
  • To promote relaxation
  • Reduce headaches
  • Increased circulation
  • For more restful sleep
  • To learn to meditate
  • For moms craving a little quiet time (ok, so this one isn’t scientifically backed, but I can vouch for it!)

Small scale studies provide some initial scientific backing for the idea of floating and sensory deprivation. One study showed increased activity in the visual cortexes of participants (1) while other studies found increased creativity in university professors and students (measured by standardized tests for creativity). (2)

A more detailed study in the 1980s found reduced levels of stress hormones and blood pressure after floating and noted that these effects were sustained for weeks after the actual REST experience. (3)

A 2005 meta-analysis confirmed that floating is an effective stress-relief activity and that it was at least as effective (or more effective) than relaxation exercises and some types of meditation, (4) while a 1999 study showed an increase in Theta waves during floating (the same waves found in REM sleep and meditation). From that study:

Plasma and urinary cortisol, ACTH [adrenocorticotropic hormone], aldosterone, renin activity, epinephrine, heart rate, and blood pressure, all directly associated with stress, consistently decrease.(5)

Bonus Benefit: Magnesium

Pods and tanks for Floating use an epsom salt (magnesium) solution to make the water extremely saturated. In fact, the water in a float tank has a relative density of about 1.25, making it essentially impossible not to float. Almost a thousand pounds of epsom salt is dissolved in a couple hundred gallons of water, creating an almost zero gravity environment.

This allows anyone to be able to float effortlessly in the pods, plus the usual benefits of using magnesium on the skin or soaking in a magnesium bath apply.

In particular, magnesium is known to help balance calcium levels in the body, reduce stress, balance hormones, normalize blood pressure, reduce risk of cancer and other diseases and much more.

Skepticism about Floating:

Any therapy has its skeptics and floating is no exception. Skeptics point out that all studies done on REST therapy used small groups of people, reducing the statistical significance.

Additionally, it is difficult to know if the act of floating and partial sensory deprivation is to thank for the benefits of floating, or if these benefits are due to the magnesium or the 90 minutes of relaxation.

Either way, I was unable to find any evidence of any risks or dangers of floating, though potentially, anyone with a sensitivity to magnesium might have trouble and should talk to a doctor first. I even found cases of pregnant women safely floating up until delivery using a modified position.

My Experience with Floating…

I decided to get first hand experience with floating before writing about it so I could share my experience as well. I found a float center about an hour from my house, so my husband and I booked our first appointments.

Though I’ve heard of people who have, I did not have any type of dramatic life-changing experience from my first floating experience, but I did notice some benefits. Most noticeably, I felt very relaxed and calm that day, even when I returned to the beautiful chaos of home and children.

My natural tendency toward claustrophobia (and being a control freak) made the initial few minutes of floating a little nerve wracking. This involved disrobing, showering, inserting ear plugs and climbing into a pod that looks similar to a hatch with a single door. This helps with the light and sound deprivation, but it also feels slightly like getting into a dark closet filled with water (and you can’t see the bottom or back of the tank).

I immediately noticed that it was truly impossible to sink in the tank. In fact, I couldn’t even touch the bottom when I tried to sit down, I just floated. Once I worked up the courage to actually close the door of the tank, I fought my own mind for a few minutes until I managed to calm down and start to relax (and get flashbacks of a terrible movie my husband made me watch, The Cave, out of my head).

At this point, I became acutely aware of my own heartbeat and how even a tiny movement or twitch would cause waves in the float tank. I concentrated on trying to slow my breathing and be as still as possible. A few times, it seemed as though I heard music, but I could never really tell if I was actually hearing it or if it was just my mind trying to fill the silence.

I never thought I’d say it, but the quiet was almost difficult, although at some point I started to doze off… I think. It is completely dark in the pod, and I had no way to tell time and no concept of it. At the end, I couldn’t even fully tell if I was awake or not, but I was most certainly relaxed.

After what seemed like both 10 hours and 10 minutes, the gentle music started, alerting me that my float session was over. I was so relaxed at this point, it took my muscles a second to want to move to get out of the tank.

I showered (and used a lot of natural conditioner- all the epsom salt made my hair crazy) and left the float room.

For several hours after floating, I felt very calm and relaxed. In fact, the endorphins and relaxation were similar (on a smaller scale) to the feeling after an intense workout or after natural childbirth.

I’ve talked to friends who have been “floating” for months or years and they all confirmed that the first time is the most difficult and that the benefits get better with each session. I’d definitely try it again, but unfortunately, there isn’t a float facility near us, so it would be difficult to make this a weekly activity.

Where to Float?

I found a location near me simply by searching for “float” and my city. Locations are popping up in most major cities and websites like Floatation Locations have a list of float locations near you.

Floating: Bottom Line

Floating isn’t a wonder-cure for ailments or some groundbreaking alternative therapy, but it is no longer just an obscure therapy for behavior therapy professors or hippies looking for a drug-free psychedelic experience.

It probably won’t change your world in one session, but I personally found floating very relaxing and would definitely do it again.

Have you ever “floated?” What was your experience?

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Reader Comments

  1. I am so happy you wrote about this. I did it a few times, it was the most amazing experience. it took me like 2 or 3 times to fully relax. every time i went, it was a more relaxing experience.

  2. I have a floating station about 10 minutes from my house and my husband and I are thinking about going… How often is recommended to see results?

  3. Great post. I have been wanting to do this for quite some time. This served as a great reminder of another means to take better care of myself. I appreciate the honesty.

  4. I have a salt water pool. would that suffice?

    • You have to be able to float without any effort… Salt water pools don’t usually have quite that much salt in them…

      • It has to be magnesium sulphate and not sodium chloride which is what is used in a salt water pool.

  5. I floated for the first time last April. It was surreal. I didn’t think I’d want to return when my hour ended, but now I’m yearning to do so. I had a headache later, but I think it was a cleansing experience for me on many levels.
    This is a side note: I read my blogs on bloglovin’, and for some reason yours started taking me away to your own site at some point. It has decreased the number of days I pop to your site because of the way it interferes with the continuity of my time on-line. Just wanted to mention it in case it’s something that could be changed.

    • I don’t use Bloglovin so I’m not sure how it works. If you’re afraid of missing posts, sign up for my weekly newsletter and you’ll get a recap of them mailed once a week 🙂

  6. This sounds amazing. I’ve never heard of floating as a therapeutic or relaxation technique, but being a mermaid at heart, I can almost feel the benefits just thinking about it. Thanks for this post! And all of your wonderful and detailed articles! 🙂 – Jen

  7. Great post on floating. It is wonderful and I’m glad you had a good experience. I wish they had the tanks in more places so more people could experience the serenity.

  8. Hygiene question…. Do they use the same water person after person?

    • Yes, but the concentration of epsom salt is so high that bacteria doesn’t live in the tanks

      • Besides the Epsom salt being an inhibitor of bacteria, the saltwater solution is filtered 3-4 times after each float through a combination of hydrogen peroxide and UV light (a more powerful cleansing system than bromine and chlorine according to the EPA), or dosed with bromine and chlorine, as well as being pushed through filters to filter out particulate matter. For comparison, most public pools are only filtered at night after having dozens of bathers swimming around.

    • Same as a swimming pool, hot tub and jacuzzi’s don’t change the water after each user

  9. Hi Katie!
    I’m curious, what did your husband think of it?

    • He got bored with it after about 15 minutes, but he doesn’t like to sit still for much of anything 🙂

      • What a shame he couldn’t persevere… people who can’t keep still are the one’s who benefit the most…

  10. I had a go in one just prior to having all my amalgam fillings removed!! It was so lovely and I became so relaxed and slept like a baby the night before my dental appointment, even though I was in a strange bed, in a strange city, about to under go something I was not looking forward to at all. I think it really set me up for the ordeal ahead and I sailed through the recovery!!! I would definitely go float again!!!

  11. Interesting. I just moved into a neighborhood of Edinburgh with a floatarium. I was wondering what that was all about. I’ll have to give it a try.

  12. So glad you decided to post about this! I love these tanks and have had some really wonderful experiences with them. Aside from being relaxed and magnesium restored, I have had out of body experiences (seeing myself floating from above but imagining myself out in the ocean) and back to the womb experiences. Not everyone may have these but it is truly an amazing way to reconnect with yourself and the stillness of the true self.

  13. Excellent write up on this. I haven’t tried it yet, but did check and there is 1 place that does it in my city. Woo-Hoo!

    I actually found your blog article from a comment someone posted on Abel James (AKA: Fat Burning Man) YouTube interview on this topic. A great interview and worth a watch / listen.

  14. My husband just bought a float tank for our home 🙂 I love it! It was pricey but not as bad as I had expected. We have 3 year old autistic twin boys running around so it was a much needed investment for us to have a place in our home to retreat and get away from time to time. If anyone is interested, here is where he bought it from: http://www.zenfloatco.com/buy-sensory-deprivation-tanks/

  15. The first time I ever floated it took me a while to relax. Next thing I knew my float was over. I crawled out to take a shower, walked through the hallway to the lobby, and started giggling. I felt SO good. It was a moment of wondering why floating isn’t extremely popular and in every city. I came to find out that when floating, your brain starts producing slower brain waves, the same ones associated with meditation- theta waves. In this state, the stress hormone cortisol is reduced, as well as epinephrine, nor-epinephrine and ACTH. And your brain starts pumping out endorphins and dopamine, the feel good chemicals.

    The biggest benefits seem to come when you float on a regular basis or float a few times within a week or a month. Once you learn to relax as soon as you get into the float tank, great things happen.

    Thanks for writing about this!

  16. Great! I found two in Sydney both half an hour away. One centre does the lot (salt therapy, floating, naturopath, massage, infrared, yoga etc) Christmas present for mum and dad – tick, tick.

  17. It sounds so boring and cold and uncomfortable! I just don’t think I could get into it.

    • The water is a very comfortable warm temperature and not boring at all. I have a lot of stress and chronic pain, my experience was relaxing. I’ve only been once (today) but plan to go back on a regular basis unless I do not see any improvement.

  18. Hey guys do you know of anything that you’ve done that would be “close” to this for relaxation or “similar” benefits? Something practical.

    The closest one is a bit far for me.


  19. Hi, great , informative post! I suffer from anxiety and agoraphobia. Footing sounds like another tool I can add to my tool box! That can help me function but, I feel panicky reading Katies post! Once in the tank will I have control of the door? I mean is there a panic button etcetera???

  20. Water temperature anybody?

  21. I had my first float this morning and I loved it! I have fibromyalgia and have extreme stress. I didn’t expect to feel better after one visit, I assume it might take a few, but I do feel some relief. I cant wait to schedule my next visit.