One of the benefits you’ll most often hear claimed for float tanks is their powerful relaxing effect. Subjectively, people use descriptions like “I felt more rested than if I’d slept for 16 hours on a pile of tranquilized chinchillas,” or “the way you physically feel afterwards is like getting a massage, doing a full workout, and getting 8 hours of sleep all at once”.
Many scientific studies have attempted to quantify this effect. Does it have measurable biochemical effects? Does everyone experience it? If a person has tension headaches, for instance, does this relaxation effect actually help them? And if so, how long does the effect last?
One study done recently in Sweden says the answer is yes, and the effects seem to last for months.