Skip to content
Tendground
Evidence

What works, what doesn't: every verdict on one page.

This page collects the 185 claim verdicts from 24 evidence-checked journal articles into a single reference. Every verdict is quoted verbatim from its article, and every claim links back to the full piece and the research it cites. It rebuilds automatically whenever an article is added or updated. You are free to cite any verdict here with a link to this page or to the source article.

Supported by evidence (30)

Claims where the research, on balance, backs the effect as described in the linked article.

Claim Verdict Source
Helps osteoarthritis pain and function Supported by meta-analysis, with clinical devices Do PEMF mats work? What the evidence actually shows
Aids non-union fracture healing FDA-approved, prescribed, specific devices Do PEMF mats work? What the evidence actually shows
Adjunct in spinal fusion FDA-approved for that use Do PEMF mats work? What the evidence actually shows
Standing burns more calories than sitting True per hour, negligible per day Do standing desks actually work? The honest answer
Improves barrier function and surface hydration Supported by a small controlled study Does a sauna help your skin? What the research shows
Habituation blunts the response Yes, with repeated exposure over time Does a sauna or cold plunge lower cortisol?
Fluids and electrolytes Helps thirst and mild dehydration Does anything actually cure a hangover? Sauna, cold and IV drips
Sleep disrupted by pain or muscular tension Reasonable case Does massage help you sleep? What the evidence supports
High stress, wound-up, hard to switch off Reasonable case Does massage help you sleep? What the evidence supports
Acute disruption: illness, hospital, major stressor Best-supported case Does massage help you sleep? What the evidence supports
The breathing, not the cold, drove that result Supported by the mechanism measured Does the Wim Hof Method actually work? The honest evidence
It improves cold tolerance Yes, and unsurprising with practice Does the Wim Hof Method actually work? The honest evidence
Same association with family doctor visits Yes, comparable magnitude Is neck manipulation safe? What the stroke evidence says
CBT for hot flushes Best-supported nonhormonal approach Menopause and wellness: what actually helps
Clinical hypnosis Well supported in the review Menopause and wellness: what actually helps
Strength training Strong for bone, muscle, mood, sleep Menopause and wellness: what actually helps
Reduces stress, feels relaxing Strong and consistent Sauna benefits: what the science actually says
The vagus nerve is the main parasympathetic pathway True The vagus nerve: what's actually real, and what isn't
Most of its fibres carry signals body to brain True The vagus nerve: what's actually real, and what isn't
Implanted stimulation treats epilepsy and some depression True, and it is surgery The vagus nerve: what's actually real, and what isn't
HRV partly reflects cardiac vagal activity True, with heavy caveats The vagus nerve: what's actually real, and what isn't
Slow breathing acutely raises HRV Well established The vagus nerve: what's actually real, and what isn't
Walking outdoors Strong for mood, cardiovascular, stress The wellness that costs nothing, ranked honestly
Strength training Strong for muscle, bone, mood, sleep The wellness that costs nothing, ranked honestly
Slow breathing Well supported acutely The wellness that costs nothing, ranked honestly
Social contact Strong population-level evidence The wellness that costs nothing, ranked honestly
Yoga / Pilates Reasonable for back and general function Wellness for desk workers: what helps a stiff neck and shoulders
Flexibility and mobility Strong Yoga benefits: what the science actually says
Strength and balance Strong Yoga benefits: what the science actually says
Stress and anxiety Strong to moderate Yoga benefits: what the science actually says

Mixed or limited evidence (92)

Claims where the evidence is partial, conditional, or depends heavily on your situation.

Claim Verdict Source
Late fall through spring The prime window, book ahead Best wellness retreats in Florida and the Keys for 2026
Early summer Doable with an indoor-heavy program Best wellness retreats in Florida and the Keys for 2026
June through November Check cancellation terms carefully Best wellness retreats in Florida and the Keys for 2026
Holiday weeks Highest prices of the year Best wellness retreats in Florida and the Keys for 2026
Morning sauna after a heavy night Usually OK Can you drink alcohol in a sauna? The honest safety answer
A drink 20+ minutes after, rehydrated Fine for most Can you drink alcohol in a sauna? The honest safety answer
Any of the above with a heart condition Ask a doctor Can you drink alcohol in a sauna? The honest safety answer
Fully healed surface, no scabs Fine for all of it Can you use a sauna with a tattoo? New ink and old
Large or heavily shaded piece Wait longer; healing takes longer Can you use a sauna with a tattoo? New ink and old
Fresh tattoo and a booked spa day Reschedule, or keep to dry areas only Can you use a sauna with a tattoo? New ink and old
Healed tattoo and a hammam scrub Fine, though say so; scrubs are vigorous Can you use a sauna with a tattoo? New ink and old
Any sun exposure, ever This is what actually fades ink Can you use a sauna with a tattoo? New ink and old
Feels intense, then warm, then relaxing Consistently reported by users Do acupressure mats actually work? The honest answer
Increases blood flow to the skin under it Visible flushing, immediate Do acupressure mats actually work? The honest answer
Helps you relax or wind down Consistent with a relaxation response Do acupressure mats actually work? The honest answer
Eases nonspecific back or neck tension A few small trials, mixed, unblinded Do acupressure mats actually work? The honest answer
Improves sleep Small studies, inconsistent, unblindable Do acupressure mats actually work? The honest answer
Treats or cures a medical condition Nothing supports this Do acupressure mats actually work? The honest answer
Low back pain Mixed Do PEMF mats work? What the evidence actually shows
Prolonged uninterrupted sitting is bad for you Consistent in large observational studies Do standing desks actually work? The honest answer
Changing position frequently helps The most defensible claim here Do standing desks actually work? The honest answer
Standing improves weight or metabolic markers Small, short, inconsistent trials Do standing desks actually work? The honest answer
Standing desks improve focus or productivity Small, largely self-reported studies Do standing desks actually work? The honest answer
Static standing has its own costs Leg and foot discomfort, varicose veins Do standing desks actually work? The honest answer
Balance and mobility in older adults Several small trials and reviews point this way Do vibration plates actually work? The honest answer
Bone density in postmenopausal women Studied, results inconsistent across trials Do vibration plates actually work? The honest answer
Increases circulation during a session Consistent acute effect Do vibration plates actually work? The honest answer
Short-term flexibility or range of motion Commonly reported acute effect Do vibration plates actually work? The honest answer
Reduces muscle soreness Small and inconsistent findings Do vibration plates actually work? The honest answer
"10 minutes equals an hour at the gym" Nothing supports the equivalence Do vibration plates actually work? The honest answer
Immediate glow Real, temporary, and it is circulation Does a sauna help your skin? What the research shows
Helps eczema Mixed; heat and sweat often trigger flares Does a sauna help your skin? What the research shows
Bad for rosacea Heat is a well-recognised trigger Does a sauna help your skin? What the research shows
Sauna lowers cortisol It rises acutely; the session is a thermal stressor Does a sauna or cold plunge lower cortisol?
"Lowering cortisol" is a good goal It is the wrong frame Does a sauna or cold plunge lower cortisol?
Eases muscle tension and stiffness Warm immersion reliably relaxes muscle and improves mobility Does an Epsom salt bath do anything?
Helps you fall asleep Warm bathing before bed improves sleep onset and quality Does an Epsom salt bath do anything?
Flushes lactic acid Lactate clears on its own well before the bath Does an Epsom salt bath do anything?
Feels pleasant, softens the water Consistent with reports, mild and cosmetic Does an Epsom salt bath do anything?
Painkillers Symptom relief only Does anything actually cure a hangover? Sauna, cold and IV drips
Time and sleep The only thing that resolves it Does anything actually cure a hangover? Sauna, cold and IV drips
Cold plunge reduces inflammation Acute post-exercise markers; may blunt training adaptation Does anything you can book actually reduce inflammation?
Massage reduces inflammation Soreness and perceived fatigue, which is a different outcome Does anything you can book actually reduce inflammation?
Compression reduces inflammation Swelling and soreness, short-term Does anything you can book actually reduce inflammation?
Anti-inflammatory supplement stacks Rarely measured in humans at realistic doses Does anything you can book actually reduce inflammation?
Sauna and chronic markers Some cohort association, confounded by who saunas Does anything you can book actually reduce inflammation?
Classic chronic insomnia, mind racing Weak; CBT-I is the treatment Does massage help you sleep? What the evidence supports
It clears lactic acid Lactate clears itself in 30 to 60 minutes Does massage release toxins? The lactic acid myth, examined
Massage increases blood flow to the muscle Measured directly: it reduced it Does massage release toxins? The lactic acid myth, examined
Soreness after means it worked Soreness after means mechanical load, nothing more Does massage release toxins? The lactic acid myth, examined
Trained people can blunt an induced inflammatory response Demonstrated in one small controlled study Does the Wim Hof Method actually work? The honest evidence
Association between neck manipulation and stroke Present in crude data Is neck manipulation safe? What the stroke evidence says
Most likely explanation People already dissecting seek care for neck pain Is neck manipulation safe? What the stroke evidence says
Absolute rate Very rare, roughly 1 in several hundred thousand to 1 in a million Is neck manipulation safe? What the stroke evidence says
Effectiveness for neck pain Modest short-term benefit, similar to other manual therapy Is neck manipulation safe? What the stroke evidence says
Reasonable conclusion Low risk, modest benefit, alternatives exist Is neck manipulation safe? What the stroke evidence says
Yoga, mindfulness Helpful for sleep and stress; weaker for flushes specifically Menopause and wellness: what actually helps
Hormone therapy Substantial evidence; a medical conversation Menopause and wellness: what actually helps
Exercise and strength work First-line in every major guideline Osteoarthritis: what actually helps, and where wellness fits
Tai chi Comparable to physical therapy in a randomized trial Osteoarthritis: what actually helps, and where wellness fits
Aquatic exercise, hot springs Small, short-term benefits Osteoarthritis: what actually helps, and where wellness fits
Heat, sauna, paraffin A few small trials, comfort-level in guidelines Osteoarthritis: what actually helps, and where wellness fits
Cold The same thin evidence as heat Osteoarthritis: what actually helps, and where wellness fits
Massage Less pain while sessions continue Osteoarthritis: what actually helps, and where wellness fits
Joint repair, regeneration, detox Nothing comparable to exercise Osteoarthritis: what actually helps, and where wellness fits
Linked to better cardiovascular outcomes Good, but observational Sauna benefits: what the science actually says
Muscles feel looser, recovery feels easier Well reported, mechanism plausible Sauna benefits: what the science actually says
Helps with sleep Plausible and commonly reported Sauna benefits: what the science actually says
Improves mood Suggestive, limited Sauna benefits: what the science actually says
"Vagal tone" explains most wellness benefits Marketing shorthand The vagus nerve: what's actually real, and what isn't
Sleep Strongest of anything here The wellness that costs nothing, ranked honestly
Cold showers Modest; one large self-report trial The wellness that costs nothing, ranked honestly
Sun exposure in the morning Good for circadian timing The wellness that costs nothing, ranked honestly
Naps Real and underrated The wellness that costs nothing, ranked honestly
Breaking up sitting + daily activity Strongest Wellness for desk workers: what helps a stiff neck and shoulders
Strength work for neck/upper back Good for persistent office neck pain Wellness for desk workers: what helps a stiff neck and shoulders
Massage Good short-term for tension and soreness Wellness for desk workers: what helps a stiff neck and shoulders
Heat (sauna, hot shower, pack) Symptomatic Wellness for desk workers: what helps a stiff neck and shoulders
Stretching alone Weak as a fix Wellness for desk workers: what helps a stiff neck and shoulders
Posture devices and correctors Poor Wellness for desk workers: what helps a stiff neck and shoulders
Compression boots Modest benefit for perceived fatigue and soreness What is a recovery lounge? The multi-modality studio, explained
Infrared cabin Milder heat, thinner evidence than a hot sauna What is a recovery lounge? The multi-modality studio, explained
Traditional sauna The best-evidenced heat option What is a recovery lounge? The multi-modality studio, explained
Cold tub Good for soreness; blunts strength adaptation What is a recovery lounge? The multi-modality studio, explained
Percussion / massage gun Short-term range and soreness What is a recovery lounge? The multi-modality studio, explained
Vibration plate Weak for the marketed claims What is a recovery lounge? The multi-modality studio, explained
Red light panel Real in specific uses; consumer doses differ What is a recovery lounge? The multi-modality studio, explained
Normatec-style arms Same logic as boots, less studied What is a recovery lounge? The multi-modality studio, explained
Chronic low back pain Moderate Yoga benefits: what the science actually says
Mood and wellbeing Moderate Yoga benefits: what the science actually says
Detox and organ cleansing None Yoga benefits: what the science actually says
Curing disease or boosting immunity Weak to none Yoga benefits: what the science actually says

Not supported by evidence (63)

Claims the research does not back, plus things our articles say to avoid outright.

Claim Verdict Source
Drinking in the sauna Avoid Can you drink alcohol in a sauna? The honest safety answer
Sauna while still tipsy Avoid Can you drink alcohol in a sauna? The honest safety answer
Cold plunge after drinking Avoid Can you drink alcohol in a sauna? The honest safety answer
Tattoo less than 2 weeks old No sauna, steam, hot tub, plunge or pool Can you use a sauna with a tattoo? New ink and old
2 to 4 weeks, still flaking Still wait; flaking means not healed Can you use a sauna with a tattoo? New ink and old
Healed tattoo and daily sauna No meaningful fading risk Can you use a sauna with a tattoo? New ink and old
Works by stimulating acupressure points Points are not selectively targeted Do acupressure mats actually work? The honest answer
Releases toxins or drains lymph No credible evidence Do acupressure mats actually work? The honest answer
Improves sleep Not established Do PEMF mats work? What the evidence actually shows
Speeds athletic recovery Not established Do PEMF mats work? What the evidence actually shows
Boosts energy or "cellular function" Not established Do PEMF mats work? What the evidence actually shows
Reduces inflammation systemically Not established Do PEMF mats work? What the evidence actually shows
Consumer mats match trial devices Usually not; parameters differ Do PEMF mats work? What the evidence actually shows
Detoxes or realigns anything No Do PEMF mats work? What the evidence actually shows
Standing desks relieve or prevent back pain Mixed findings, no reliable effect Do standing desks actually work? The honest answer
Burns fat or causes weight loss No meaningful support Do vibration plates actually work? The honest answer
Replaces resistance training Loads are not comparable Do vibration plates actually work? The honest answer
Reduces cellulite, detoxifies, drains lymph No credible evidence Do vibration plates actually work? The honest answer
Sweats out toxins No Does a sauna help your skin? What the research shows
Clears acne No evidence; can aggravate it Does a sauna help your skin? What the research shows
Helps psoriasis Some people improve, some worsen; not established Does a sauna help your skin? What the research shows
Reduces wrinkles No evidence Does a sauna help your skin? What the research shows
Cold plunge lowers cortisol Acute response goes up, not down Does a sauna or cold plunge lower cortisol?
A rise means it is harmful No, that is a normal stress response Does a sauna or cold plunge lower cortisol?
A single cortisol reading is meaningful No, the daily rhythm dominates Does a sauna or cold plunge lower cortisol?
Saliva cortisol tests tell you your stress level Not usefully, for the same reason Does a sauna or cold plunge lower cortisol?
Eases sore muscles after exercise Real short-term comfort, no sign it speeds repair Does an Epsom salt bath do anything?
Raises magnesium through the skin A few small, weakly designed studies, no replication Does an Epsom salt bath do anything?
Draws out toxins No plausible mechanism, no supporting evidence Does an Epsom salt bath do anything?
Sauna or steam No, and it adds fluid loss Does anything actually cure a hangover? Sauna, cold and IV drips
Cold plunge No Does anything actually cure a hangover? Sauna, cold and IV drips
IV vitamin drip No good evidence Does anything actually cure a hangover? Sauna, cold and IV drips
Sweating it out No Does anything actually cure a hangover? Sauna, cold and IV drips
Coffee No Does anything actually cure a hangover? Sauna, cold and IV drips
Food Not a cure Does anything actually cure a hangover? Sauna, cold and IV drips
Infrared sauna reduces inflammation Mostly symptomatic relief; chronic markers not established Does anything you can book actually reduce inflammation?
Red light reduces inflammation Some local effects in specific tissue; not systemic Does anything you can book actually reduce inflammation?
Suspected sleep apnoea (snoring, gasping, daytime sleepiness) No; get assessed Does massage help you sleep? What the evidence supports
Restless legs, or a circadian problem No; different mechanism Does massage help you sleep? What the evidence supports
Massage flushes toxins out No toxin exists; nothing to flush Does massage release toxins? The lactic acid myth, examined
Lactic acid causes next-day soreness No, that is muscle damage and inflammation Does massage release toxins? The lactic acid myth, examined
You must drink water afterward or feel ill Drink water because it is a good idea, not to flush anything Does massage release toxins? The lactic acid myth, examined
Massage is therefore useless No, it has real effects on soreness and perceived fatigue Does massage release toxins? The lactic acid myth, examined
It prevents or cures infections Not shown Does the Wim Hof Method actually work? The honest evidence
It treats autoimmune conditions Not shown Does the Wim Hof Method actually work? The honest evidence
It is safe to do anywhere No, see the water warning below Does the Wim Hof Method actually work? The honest evidence
The breathing can cause fainting Yes, this is expected, not a malfunction Does the Wim Hof Method actually work? The honest evidence
Causation proven No Is neck manipulation safe? What the stroke evidence says
Causation ruled out Also no Is neck manipulation safe? What the stroke evidence says
Regular aerobic exercise Good general evidence; not a flush treatment Menopause and wellness: what actually helps
Cooling strategies, layers, room temperature Practical, no downside Menopause and wellness: what actually helps
Sauna No trial evidence either way; personal experiment Menopause and wellness: what actually helps
Cold plunge for flushes No good evidence Menopause and wellness: what actually helps
Most OTC botanical supplements Not recommended in the review Menopause and wellness: what actually helps
Clears toxins through sweat Not supported Sauna benefits: what the science actually says
Burns fat or drives weight loss Not supported Sauna benefits: what the science actually says
Treats or cures illness Not supported Sauna benefits: what the science actually says
Humming or gargling "tones the vagus" Not established The vagus nerve: what's actually real, and what isn't
Cold plunges durably improve vagal tone Acute effects yes, durable no The vagus nerve: what's actually real, and what isn't
Consumer ear-clip stimulators treat anxiety, gut issues, inflammation Not established The vagus nerve: what's actually real, and what isn't
Stretching and mobility Good for range; not injury prevention The wellness that costs nothing, ranked honestly
Ergonomic chair alone Helps comfort, not a cure Wellness for desk workers: what helps a stiff neck and shoulders
Stretch area Fine; not a recovery intervention What is a recovery lounge? The multi-modality studio, explained

How the verdicts are made

Each verdict comes from the "at a glance" table of a journal article, where our editorial process weighs the published research behind a claim. The wording above is exactly what the article says, never a rewrite. To see how we decide what counts as evidence, read how we verify, and for the full set of research-backed pieces browse the wellness science section of the journal.