Sensory Deprivation Tanks Explained: 3 Benefits of Float Therapy

A sensory deprivation tank—also known as an isolation tank, flotation tank, or float tank—is an enclosed, horizontal tank filled with about ten inches of saltwater. The water in a sensory deprivation tank typically includes more than 800 pounds of dissolved Epsom salt (magnesium sulfate), which promotes buoyancy—a person cannot sink in ten inches of water. The water is 95 degrees Fahrenheit, and the tank is dark and soundproof.

After closing the tank lid, a person can float on their back in the water and experience minimized senses of sight, touch, sound, smell, and gravity. This passive recovery experience is a form of floatation therapy, formally known as restricted environmental stimulation therapy (REST). It can help ease muscles, tension headaches, neck pain, stress-related pain, and other chronic pain conditions. The sensory deprivation tank was designed in 1954 by John C. Lilly, a neuroscientist who studied the effects of sensory deprivation on the mind.

Flotation therapy can have numerous positive effects on the mind and body:

1. 1. Wellness: By numbing the senses, a sensory deprivation tank eases users into deep relaxation and enhances feelings of well-being. A float session may even spark your imagination and boost creativity.
2. 2. Physical relief: Floatation therapy can also help relieve physical pain by slowing down your heart rate and reducing high blood pressure. The Epsom salt in the water also draws out lactic acid in the body, which reduces muscle soreness and aids in the healing of overworked muscles.
3. 3. Mental health: Sensory deprivation may ease anxiety and depression. Floatation therapy is believed to facilitate the release of endorphins and decrease the production of cortisol, the stress hormone.

A float session at a float center or float spa is typically an hour long and requires advanced preparation. Follow these tips to get the most out of your session:

1. 1. Eat before your session. Eat at least 30 minutes before your session, and avoid caffeine for several hours beforehand. Eating before helps you relax and mitigates hunger pains or distracting stomach growls. Avoid drugs and alcohol before your float session.
2. 2. Shower before entering the tank. Most deprivation tanks require visitors to undress and remove jewelry before entering the sensory deprivation tank.
3. 3. Use earplugs. After you enter the tank and close the lid, lie back and float in the water. If water in your ears makes you uncomfortable, use earplugs.

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