Treatment & Procedure
Grounding / Earthing
Biohacking
Grounding, also called earthing, means direct skin contact with the earth, barefoot on grass and sand or via a mat connected to the protective earth conductor of a power outlet. Proponents see it as a missing environmental factor of the modern world. The body of studies is small, but it exists.
In brief
The idea: through the skin, the body equalizes its electrical potential with that of the earth, and this is supposed to improve inflammation, sleep and recovery. There are a handful of sham-controlled studies in humans, for example on muscle soreness, sleep and well-being, with partly favorable findings for blood values and self-reports. They are all small, and many come from the circle around the providers. The catch: the only randomized muscle soreness study found no advantage over sham grounding for pain, and hard endpoints are missing entirely.
What it is
Outdoors, grounding is simple: walking barefoot over damp grass, sand or soil, standing in the sea, lying on the ground. Indoors, there are mats, sheets and wristbands with a conductive surface that are connected by cable to the earth terminal of the power outlet. They are meant to replace contact with the ground overnight or at the desk.
The movement is carried by a small circle of researchers and entrepreneurs. Most studies come from the same people who promote the concept, and some from companies that make grounding products.
How it is supposed to work
The earth's surface carries a slightly negative charge. The proponents' hypothesis: free electrons flow into the body through the skin and neutralize free radicals there that drive inflammation. In addition, the body's electrical potential is said to stabilize, which supposedly calms the stress system, blood flow and the sleep-wake rhythm.
That the body's voltage changes during grounding is physically plausible and can be measured. That this sets off a chain leading to less inflammation and better sleep has not been shown in humans. A simpler explanation for many reports suggests itself: time outdoors, walking barefoot and a relaxation ritual already have an effect on their own.
What users report
In surveys and studies with self-reports, users report better sleep, less muscle pain, more energy and a lifted mood. In a small blinded study, massage therapists reported less pain and fatigue as long as they were grounded. Such reports should be taken seriously, but they are hard to separate from expectation, especially when participants already know the concept.
What is well supported
Nothing is well supported in the strict sense. The most robust are a few small sham-controlled studies. In a randomized study with 32 young men, the muscle damage marker creatine kinase rose markedly after strenuous squats in the sham-grounded group, but not in the grounded group. In people with mild Alzheimer's dementia, sleep quality improved over 12 weeks in a small sham-controlled study, but anxiety and depression did not.
A double-blind study from 2025 with 56 participants reports less stress, less insomnia and less daytime sleepiness after 31 days on the grounding mat compared with baseline. It was funded by companies.
What the studies show
Brown 2015 — muscle soreness with sham grounding
32 healthy young men did 200 half squats and were randomly assigned to real or sham grounding for 4 hours each on two days. Both groups had pain on all following days. Creatine kinase rose significantly on day 2 only in the sham group, and the difference between the groups was also significant.
Lin 2022 — sleep in mild Alzheimer's dementia
22 patients were enrolled and 15 completed the 12 weeks; the comparison was with sham grounding. Sleep quality on the Pittsburgh questionnaire improved significantly more. Anxiety and depression scores did not change.
Chevalier 2019 — massage therapists
16 massage therapists, double-blind, over 6 weeks, 4 of them grounded during work and sleep. In questionnaires, pain, fatigue and low mood decreased, while energy and physical function increased. The study comes from the circle of earthing researchers.
Where the data stop
All studies are small; many run only a few days to weeks and measure blood values or questionnaires instead of disease courses. A large part comes from a narrow circle of authors who advocate the concept, or is funded by manufacturers. A 2020 review by proponents speaks of around 20 studies, but it is a narrative summary, not a systematic analysis with quality assessment.
In the only randomized muscle soreness trial, pain did not differ. Where there are positive findings, independent replications are missing. A study after spinal surgery found less pain and inflammation, but its comparison was without sham grounding. Whether grounding prevents diseases or changes their course has not been studied by anyone.
Status, approval and legal
Grounding is not a medical service. Walking barefoot costs nothing. Grounding mats and sheets are sold as wellness products, without efficacy testing. You can recognize reputable providers by the fact that they make no promises of cure against inflammation, cardiovascular disease or sleep disorders. If you want to try it, going outside is the cheapest and most obvious option.
Safety
There are no controlled safety data, because the method has hardly been studied systematically. Walking barefoot outdoors brings the usual risks, from cuts to insect stings; in diabetes with nerve damage in the feet, caution is needed. Grounding mats are connected to the protective earth conductor of the household wiring. Whether that is safe depends on the electrics; if in doubt, a qualified electrician can help. Grounding does not replace treatment of sleep disorders, inflammatory diseases or pain.
BK-Score Thin human evidence
| Human evidence | 4 | |
|---|---|---|
| Mechanism | 1 | |
| Safety data | 1 | |
| Hype gap | 1 | |
| Track record of use | 5 |
There are human data, but only small ones: in a randomized, sham-controlled study with 32 men (Open Access J Sports Med 2015), creatine kinase rose after squats only without real grounding; for pain there was no advantage. Small sham-controlled studies report better sleep scores, one of them in 15 people with mild Alzheimer's dementia; one with 56 participants was manufacturer-funded and reports improvements compared with baseline. Endpoints are blood values and questionnaires, not disease courses. The postulated chain of action, that electrons from the ground neutralize free radicals, is not supported in humans. Controlled safety studies do not exist. Key studies come from a narrow circle of proponents.
The score rates the state of knowledge, not the substance. “Safety data 9” means well studied – not harmless.
Subjective assessment by Biohacking Kompakt based on published scoring rules – not a scientific rating and not a medical recommendation. Rules and all ratings (German)
Frequently asked questions about grounding / earthing
What does grounding really do?
Small studies report better sleep, less stress and changed blood values after muscle exertion. The studies are small, often from the circle around the providers, and for pain the randomized muscle soreness study found no advantage.
Do grounding mats work?
A double-blind study with 56 participants reported less stress and insomnia after 31 days compared with baseline. It was funded by companies; independent confirmations are missing.
Does walking barefoot help against inflammation?
There are no robust data in humans on this. The idea that electrons from the ground neutralize free radicals is a hypothesis that has not been confirmed.
Does earthing improve sleep?
In two small sham-controlled studies, sleep scores improved, once in people with mild Alzheimer's dementia. That is an indication, not proof.
Is grounding dangerous?
Walking barefoot is harmless for most people; caution is needed with nerve damage in the feet. With grounding mats, safety depends on the household electrics. There are no systematic safety data.
How long should you ground yourself?
Studies have worked with a few hours a day or with grounding overnight. There is no established minimum duration.
Related
- Same categoryRed light / photobiomodulation (PBM)
- Same categorySauna & cold (hormesis)
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- Same sectionSleep & sleep hygiene
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- Same sectionIV vitamin therapy (Myers' cocktail)
Sources
- Brown, Chevalier, Hill, Open Access J Sports Med 2015 (muscle soreness, randomized)
- Brown, Chevalier, Hill, J Altern Complement Med 2010 (pilot study)
- Lin et al., Healthcare (Basel) 2022 (sleep in Alzheimer's)
- Chevalier et al., Explore (NY) 2019 (massage therapists)
- Park et al., Adv Integr Med 2025 (grounding mat and sleep)
- Sokal et al., J Clin Med 2025 (after spinal surgery)
- Menigoz et al., Explore (NY) 2020 (review by proponents)
- Chevalier et al., J Environ Public Health 2012 (review by proponents)
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Information only, not medical advice and not a usage or dosage recommendation. Prescription-only and unapproved substances belong in the hands of a physician. Last updated: 2026-09-30.