Grounding Research: The Complete Library
Every published human study of indoor grounding products we could find — sheets, mattress pads, mats, patches — assembled in one place and checked against the journals: 28 studies across twenty years, plus the reviews, each with its design, sample size, product, result and who paid for it. Last reviewed 19 September 2026. Know a peer-reviewed study we have missed? Send it to us and we will add it.
How to read this page. We mark every study by who funded it. Independent means a university or hospital with no grounding-product money involved; manufacturer-funded means a mat maker other than the American company that pioneered the field; industry-funded means Earth FX / Earthing Institute funding or authorship. Studies in patient groups are shown separately and never used to describe what our products do for healthy customers.
Our products are general wellness products, not medical devices. Nothing here is a claim to diagnose, treat, cure or prevent any disease.
The findings, attributed
Ten results from studies in healthy adults, written the way the papers report them.
Sleep · double-blind trial
In a randomised, double-blind, placebo-controlled trial, adults sleeping on an earthing mat recorded significantly more total sleep time than those on a sham mat, and lower insomnia severity at follow-up.
Kyung Hee University College of Medicine, Seoul · 2025 · 56 adults analysed · 31 days · Read the paper ↗
Recovery · triple-blind, independent
In a triple-blinded, sham-controlled trial, grounded sleeping accelerated recovery and reduced markers of muscle damage and inflammation after intensive exercise.
University of Salzburg · 2019 · 22 adults · 10 nights · no industry ties · Read the paper ↗
Muscle damage · double-blind
In a randomised, double-blind study, men who grounded after hard exercise showed a smaller rise in creatine kinase, a muscle-damage marker, than sham controls (P = 0.04 at day 2).
Open Access Journal of Sports Medicine · 2015 · 32 men · Read the paper ↗
Sleep & cortisol · pilot
In the first grounded-sleep study, night-time cortisol fell and cortisol rhythms moved toward the normal 24-hour pattern; participants reported better sleep and less pain and stress.
Journal of Alternative and Complementary Medicine · 2004 · 12 adults · 8 weeks · no control group · Read the paper ↗
Nervous system · controlled
Grounding improved heart-rate variability beyond simple relaxation (P < 0.01) — a shift toward the body's rest-and-repair state.
Integrative Medicine · 2011 · 27 adults · Read the paper ↗
Blood viscosity · pilot
Two hours of grounding increased the surface charge on red blood cells and reduced clumping — the basis of the blood-viscosity finding.
Journal of Alternative and Complementary Medicine · 2013 · 10 adults · Read the paper ↗
Blood flow · double-blind pilot
One hour of grounding improved blood-flow regulation and signs of inflammation on thermal imaging.
Health · 2015 · 40 adults · randomised, double-blind · Read the paper ↗
Mood · double-blind pilot
One hour of grounding improved pleasant and positive mood within the grounded group; the control group also improved on one measure, so we cite this cautiously.
Psychological Reports · 2015 · 29 adults analysed · Read the paper ↗
Fatigue & function · RCT
In a double-blind randomised trial, massage therapists who grounded at work and while sleeping reported improved physical function and reduced fatigue and anxiety.
Explore · 2019 · 16 therapists · 6 weeks · Read the paper ↗
Metabolism · double-blind crossover · independent
Blood urea was lower during and after cycling when the body was earthed, suggesting reduced protein breakdown.
Evidence-Based Complementary and Alternative Medicine · 2013 · Polish academic group · Read the paper ↗
The human studies, in order
22 studies in healthy adults, 8 of the 28 total independent of grounding-product money — from Poland, Austria, Taiwan, Malaysia and the United States.
Pilot, pre/post, no control · 12 adults with sleep, pain and stress complaints · conductive mattress pad · 8 weeks · J Altern Complement Med
Night-time cortisol reduced; cortisol rhythm resynchronised toward normal; better self-reported sleep, pain and stress. Within-group only.
Measurement study · conductive patch and bed pad to earth ground · Eur Biol Bioelectromagn
Induced 50/60 Hz body voltage fell to near zero when grounded — a physics measurement, not a health outcome.
Controlled measurement · 58 adults · patches · EEG, EMG, blood-volume pulse, skin conductance
Rapid electrophysiological shifts within seconds of grounding.
Sham-controlled pilot · 8 men (4 grounded, 4 sham) · conductive sheets and patches · 72 h after eccentric exercise · J Altern Complement Med
Markers of muscle damage (creatine kinase, white cells, bilirubin) and pain differed in favour of grounding; screened by ≥10% differences rather than formal tests.
Double-blind crossover · 28 adults · patches · 40 minutes · J Altern Complement Med
Immediate fall in skin conductance at grounding; shifts in respiratory rate, blood oxygenation and pulse-rate variability.
Sham-controlled · 27 adults analysed · 2 hours · Integrative Medicine
HRV improved significantly beyond relaxation (P < 0.01).
Series of controlled experiments · healthy adults earthed via copper conductor · Poland · J Altern Complement Med
Changes in serum calcium, phosphate, iron and glucose and in renal mineral excretion while earthed.
Controlled experiments · Poland · J Altern Complement Med
Earthing altered measured bioelectrical parameters of the body.
Pilot, pre/post · 10 healthy adults · patches to a ground rod · 2 hours · J Altern Complement Med
Red-cell zeta potential rose about 2.7-fold and clumping fell — lower blood viscosity. Within-group only.
Double-blind crossover · cyclists earthed vs unearthed · Poland · Evid Based Complement Alternat Med
Lower blood urea during exercise and recovery when earthed.
Randomised, placebo-controlled pilot · 40 adults · 1 hour · J Cosmetics, Dermatological Sciences and Applications
Improved regulation of facial blood flow on laser imaging.
Randomised, sham-controlled, double-blind · 32 men · grounded 4 h/day for 2 days after 200 knee bends · Open Access J Sports Med
Creatine kinase rose in the sham group but not the grounded group; between-group difference significant at day 2 (P = 0.04). No pain difference.
Double-blind · 28 adults · 1 hour of gentle yoga on a grounded vs sham mat · Open J Prev Med
Reduced blood viscosity (higher red-cell surface charge) after grounded yoga.
Randomised, double-blind pilot · 40 adults · 1 hour · thermal and laser-speckle imaging · Health
Improved blood flow and signs of inflammation in the torso and face.
Randomised, double-blind pilot · 40 randomised, 29 analysed · 1 hour · Psychological Reports
Grounded group improved on pleasant, positive and relaxed mood; the sham group also improved on one measure; no between-group test reported.
Measurement study
Grounding reduced body voltage and current induced by household fields.
Exploratory · massage therapists grounded at work · Chopra Center · Health
Reported reductions in stress and pain markers over the study period.
EEG signal study · Universiti Malaysia Pahang · J Telecommunication, Electronic and Computer Engineering
Brain-signal patterns associated with stress changed measurably during body earthing.
Double-blind stepped-wedge randomised trial · 16 massage therapists · grounded at work and while sleeping · 6 weeks · Explore
Improved physical function, reduced fatigue and anxiety.
Randomised, sham-controlled, triple-blinded · 22 adults (12 grounded, 10 sham) · 10 nights after downhill running · University of Salzburg · Frontiers in Physiology
Smaller loss of strength and jump power and smaller rise in creatine kinase in the grounded group (P < 0.05); lower inflammation markers. Blinding verified electrically.
EEG signal study · Universiti Malaysia Pahang · Int J Adv Sci Eng Inf Technol
Measurable EEG changes with body earthing, consistent with reduced stress signals.
Randomised, double-blind, placebo-controlled · 60 healthy adults randomised, 56 analysed · earthing mat 6 h/day for 31 days, follow-up day 38 · Kyung Hee University College of Medicine · Advances in Integrative Medicine
Total sleep time (actigraphy) significantly higher than the sham group (P < 0.05); insomnia severity better than sham at follow-up; sleep quality, sleepiness and stress scores improved within the grounded group. Funded by the mat's manufacturer; authors declare no competing interests.
Studies in patient groups — clinical background only
These were run in people with a diagnosed condition. They belong on this page for completeness; they are not evidence of what a grounding sheet does for a healthy sleeper, and we do not use them that way.
Interventional measurement · neonatal intensive care · Penn State College of Medicine · Neonatology
Grounding through a patch electrode reduced skin voltage and raised vagal tone (heart-rate variability) in preterm infants.
Case series, no control · 10 patients with hypertension · grounded ≥10 h/day · Altern Ther Health Med
Systolic blood pressure fell by 8.6–22.7% (average 14.3%) over the period. Uncontrolled; patient group.
Small double-blind randomised trial · 12 adults with chronic low back pain · earthing sleep mat · not indexed in PubMed
Pain improved more with earthing (about 38% vs 17%). Very small sample; patient group.
Randomised, double-blind, sham-controlled pilot · 22 enrolled, 15 completed · grounding mat 30 min, 5 days a week, 12 weeks · Kaohsiung Chang Gung Memorial Hospital · Healthcare · registered NCT05246332
Sleep quality (PSQI) improved significantly versus sham (P = 0.006); anxiety and depression scores did not change. Patient group.
Observational, uncontrolled · 71 patients · University of Basrah · Biomedical Journal
Reported improvement in most cases; no control group. Patient group — background only.
One-group pre/post, no control · 21 patients · 1 h/day for 30 days · Indonesian nursing college · not indexed in PubMed
Reported faster wound healing. Uncontrolled; patient group — background only.
Reviews and the mechanism
Journal of Environmental and Public Health
Gathers the sleep, pain, stress, heart-rate-variability and blood-viscosity findings to 2012 and proposes free-electron transfer as the mechanism.
Journal of Inflammation Research · authors disclose Earth FX contracts and shareholdings
Compiles thermal-imaging and marker evidence linking grounding to lower chronic-inflammation markers.
Alternative Therapies in Health and Medicine
Narrative review of the clinical picture to 2017.
Explore
Review of research evidence and clinical observations; recommends grounding as a lifestyle-medicine strategy.
Biomedical Journal 46(1) · Chang Gung University / Elsevier
Four review papers. Three are by authors with grounding-industry ties (disclosed); Jamieson's integrative review on electromagnetic hygiene declares no conflicts and is the independent one.
Rat studies at Kyung Hee University (stress behaviour 2022; sleep EEG 2024) and an in-vitro mitochondrial study (FEBS Open Bio 2025)
Earthing mats increased sleep and reduced stress behaviour in rats; grounded isolated mitochondria produced 5–11% more ATP with 22–33% less reactive oxygen. Mechanistic support only — never a product claim.
No Cochrane systematic review of grounding exists, and no large multi-centre trial has been run. Independent critics point to small samples, imperfect blinding and commercial funding; we list those criticisms here because they are fair, and because the newer double- and triple-blinded trials are the answer to them.
Our verdict
Across two decades, studies consistently report modest, favourable effects of indoor grounding on sleep, stress, muscle recovery, blood flow and heart-rate variability — and the same direction keeps appearing in different labs, different countries and different designs. The best-designed trials now exist: a double-blind sleep trial in Seoul, a triple-blind recovery trial in Salzburg, a double-blind sleep pilot in Taiwan. The samples are still small, some of the early work was funded by the industry that pioneered it, and no large independent trial has been run. That is why we say studies report rather than proven.
What is not in doubt is whether the connection exists. Our fabric's conductivity is measured by Bureau Veritas and published. Whether you are grounded can be seen on a multimeter on your own body. And what grounding does for you is a question a month of nights answers, at the price of a pillowcase, with the risk on us. Find your starting point →
- We report what studies found, attributed to the institution and year, in the past tense.
- We describe findings in healthy adults. Studies in patient groups appear here as background, never as benefits.
- We never claim to treat, prevent or cure any disease, and we never say "proven".
- If a study is small, uncontrolled or industry-funded, we say so where we cite it.
- This library is complete to the best of our knowledge at the date shown. If we have missed a study, we add it rather than argue about it.
Educational content only — not medical advice. Naturalive products are general wellness products, not medical devices, and are not intended to diagnose, treat, cure or prevent any disease. If you have a pacemaker or other implanted device, take blood-thinning medication, or are pregnant, consult your doctor before starting. Full disclaimer.