The library · five sections
73 guides. Every figure with its source.
Saunas, cold plunges, red light, the build behind a recovery room and the smaller tools around it. Each guide says which numbers are the manufacturer's, prices everything installed, and names what we have not measured yet.
- 01 Home Saunas Most asked: Sauna blankets: how the heat differs from a sauna, and which one to buy 17
- 02 Cold Plunge Most asked: The best cold plunge and ice bath tubs of 2026, from an inflatable to $9,990 7
- 03 Red Light Therapy Most asked: Omnilux mask: what the Contour actually delivers, and where to buy it safely 18
- 04 Recovery Room Builds Most asked: Sauna electrical requirements: circuits, costs and the questions to ask an electrician 4
- 05 Recovery Tools Most asked: The best massage gun is the one that tells you its amplitude 27
01Heat
Home Saunas 17 guides
Barrel, cabin, indoor infrared and the heaters that run them. Sizing math, electrical requirements, and what wood species actually costs you over ten years.
- Buying guide 10 min read Sauna blankets: how the heat differs from a sauna, and which one to buy A sauna blanket is a heated sleeping bag on a wall outlet. It raises your core temperature by a different route from a sauna, the sauna research does not automatically apply to it, and the weight it takes off is water. Here is how to choose one anyway.
- Buying guide 11 min read Portable sauna: what a steam tent really is, how hot it runs, and the two worth buying Almost every portable sauna on Amazon is a fabric tent over a tabletop steamer: a personal steam bath, not a Finnish sauna. How hot that really is, where the scald and electrical risks sit, how it compares with a sauna blanket, and the two tents we would buy.
- Brand review 11 min read Sunlighten sauna review: the three models, priced, and who each one is for Amplify, Signature and Solo priced September 2026, what full-spectrum actually means, the circuit each one needs, and the health claims we will not repeat.
- Gear guide 9 min read Sauna hats: why wool on your head makes the ceiling air bearable Your head sits in the hottest air in a sauna, the layer the ceiling sensor reads. A wool felt hat slows the heat flowing into your scalp, and the physics says by a useful amount. Here is why, which material does it best, and the figure we still owe you.
- Sizing guide 9 min read Sauna heater sizing: the kW math, the amps, and which heater to buy How many kilowatts your room needs, what circuit that requires, and why the $1,318 Harvia beats the $1,751 HUUM at identical output. Priced September 2026.
- Protocol guide 11 min read How hot should a sauna be? Temperature by sauna type, measured at the bench Traditional saunas run 150 to 195°F, infrared cabins 110 to 140°F, and the number on the controller is read near the ceiling, not where you sit. Here is the range by sauna type, the legal ceiling in the US, and where the figure comes from.
- Planning guide 14 min read DIY sauna: how to build a sauna, in the order that saves money A DIY sauna is a light carpentry project wrapped around a licensed electrical one. The order you plan it in decides the cost: circuit first, heater second, room third. Priced line by line from scratch, $4,913 to $6,928 for a 4 x 6 room, and against a real materials package, November 2026.
- Protocol guide 9 min read Sauna before or after a workout? After, and what the studies actually measured The training studies that paired a sauna with exercise put the heat after the session, and the best-measured effect is more blood plasma, not faster recovery. Heat beforehand spends the margin you train on. Here is what each study measured, how long and how hot they went, and who should skip it.
- Protocol guide 10 min read How long should you stay in a sauna? Minutes by temperature and experience Ten to twenty minutes at 160 to 190°F is the range most guidance lands on, and the Finnish cohort data says roughly the same. Here is the time by temperature and experience, the point where it becomes unsafe, and what to do after a workout.
- Buying guide 13 min read The best home saunas of 2026: indoor, outdoor and the $2,099 exception The best sauna for home, ranked by the constraint that actually decides it: what electrical you can get to the space. Indoor infrared, outdoor traditional, and the one portable system a renter can own — with installed cost itemized.
- Brand review 10 min read Redwood Outdoors review: what $6,299 to $7,499 actually buys Every Redwood sauna and cold plunge we have specs for, saunas priced September 2026 and plunges October 2026, with the heater upgrade the base barrel needs and the circuit nobody quotes you.
- Comparison 13 min read Infrared vs traditional sauna: they are different appliances, not price tiers One heats the air to 190°F and lets you throw water. The other warms your tissue at 130°F and plugs into a wall outlet. Choosing on price is how people end up disappointed.
- Buying guide 14 min read The best outdoor saunas of 2026, ranked by installed cost We priced eleven outdoor saunas from eight brands sold in the US, barrel, cabin, infrared and hybrid, from $4,485 to $16,240, with the heater, the circuit and the pad. The winner is not the one with the best marketing — it is the one that costs least to still own in ten years.
- Evidence guide 11 min read Does a sauna help you lose weight? What the scale drop is, and what it is not A sauna round takes about a pound off the scale, and almost all of it is sweat that comes back when you drink. The calories are close to sitting still, the fat-loss studies are small, and using heat to make weight has killed people. Here is what each study measured.
- Health and use 9 min read Sauna when sick: does it help a cold, and when is it a bad idea? No trial shows a sauna shortens a cold, one small trial suggests regular bathers catch fewer of them, and with a fever the answer is no. Here is what the studies actually measured, when the heat is a risk rather than a comfort, and how the numbers change on the days you go anyway.
- Buying guide 10 min read Backyard sauna kit: what is in the box, what is not, and the installed cost The heater is usually included in a backyard sauna kit. The pad, the electrician and the permit are not, and they are what move a $6,299 kit to $9,000 installed. Itemised, priced September 2026.
- Category guide 12 min read The best barrel saunas of 2026, and why the shape works at all The barrel is the cheapest route to a real traditional sauna, and the geometry is the reason. Six barrels from four brands, $4,485 to $7,499, priced installed: what the curve buys you, what it costs you, and which models are worth the money in 2026.
02Cold
Cold Plunge 7 guides
Tubs, chillers and the horsepower you need to hold 45°F in an August garage. Plus what a chest-freezer conversion really costs once you price the safety work.
- Buying guide 20 min read The best cold plunge and ice bath tubs of 2026, from an inflatable to $9,990 We priced every serious cold plunge in the US market against the ice you would otherwise buy, then went one tier down to the inflatable ice bath tubs people start on. The chiller is the only part where paying more reliably buys you something, and the ice arithmetic says when you need one.
- Brand review 10 min read Ice Barrel review: the 300, the 500, and the weight nobody mentions Ice Barrel's vertical and horizontal tubs priced September 2026, the floor loading a filled one puts on a garage slab, and what their HSA/FSA line actually means.
- Sizing guide 8 min read Cold plunge chiller sizing: how much horsepower you actually need 1/4, 1/3, 1/2 or 1 HP — sized against gallons, ambient temperature and insulation quality. Most buyers overspend on horsepower and underspend on the lid.
- Protocol guide 10 min read Cold plunge temperature: how cold, how long, and what the chiller display is not telling you Most home protocols run 45 to 59°F, beginners start at 55 to 60°F, and every chiller sold for home tubs bottoms out at 37 to 39°F. The number that matters is the water at mid-depth, and it is not the one on the display.
- Product review 9 min read Redwood Outdoors Alaskan cold plunge tub review: two tubs, not one with a chiller The ice-only Alaskan at $2,700 and the Alaskan All-In-One at $6,999, priced 17 October 2026 from Redwood's own product data: what each one actually is, what it weighs filled, the outlet and the pad it needs, and the cheaper ways to the same plunge.
- Evidence guide 11 min read What is a cold plunge, and which of its benefits hold up? A cold plunge is a few minutes in water between about 39 and 59°F. Less soreness after hard exercise is the benefit with real trial support. The dopamine, immunity, fat-burning and mood claims rest on thin evidence, and plunging straight after lifting can blunt muscle growth. Here is each claim graded, the timing question answered, and who should not plunge at all.
- Cost analysis 7 min read How much is a cold plunge? Equipment, ice, power and the three-year total A cold plunge is $1,150 to $9,990 for the tub, and that is the only number on the product page. Equipment, ice, electricity and water changes, totalled over three years. Whether ice or a chiller is cheaper turns on how often you plunge and whether a lid keeps the water cold between sessions — here is the full calculation, and what holding 45°F actually adds to your power bill.
03Light
Red Light Therapy 18 guides
Panels, wavelengths and the dosing arithmetic every brand skips. Why the irradiance number on the box is usually not the one you are receiving.
- Brand guide 9 min read Omnilux mask: what the Contour actually delivers, and where to buy it safely The Omnilux Contour is the LED mask the rest of the market measures itself against: 633 and 830 nm, 132 LEDs, about 30 mW/cm² by Omnilux's own figure. What those numbers mean, what the evidence behind the brand is, why the Amazon listing is not one we would buy from, and the masks that share its wavelengths for less.
- Evidence guide 10 min read Red light therapy before and after: what the trials saw, and when What a red light before-and-after can honestly show, area by area: skin texture after about 15 weeks of twice-weekly sessions in the best skin trial, hair after 16 to 26 weeks, weaker evidence for acne, none worth the name for weight loss. Why most before-and-after photos mislead, and how to take your own so they do not.
- Buying guide 14 min read The best red light therapy mask is the one that puts its numbers in writing Thirteen LED face masks, four neck masks and three eye masks sold on Amazon, compared on the three things a buyer can check before paying: an FDA clearance you can look up, the wavelengths, and a stated irradiance. Which ones publish all three, which publish none, and what the evidence supports either way.
- Brand guide 9 min read CurrentBody LED mask: Series 1, 2 and 3 compared, and which one to buy CurrentBody sells three generations of LED face mask at once, plus neck masks, an acne mask, a hair helmet and a panel. What changes from Series 1 to Series 3 (wavelengths, LED count, the app), which ones hold an FDA clearance we could find, where each is sold, and which we would buy.
- Product guide 7 min read Shark red light mask (CryoGlow): cleared, short programs, no published numbers Shark's CryoGlow is the LED mask with the clearest regulatory paper trail among the mainstream brands: FDA 510(k) K242796, for wrinkles with acne as a second code. What its four programs do, what the cooling pad is for, what the listing will not tell you, and which masks to weigh against it.
- Brand guide 8 min read Dr. Dennis Gross LED mask: what three minutes of FaceWare Pro can and cannot do The DRx SpectraLite FaceWare Pro is the three-minute mask from a dermatologist-founded skincare brand: 100 red and 60 blue lights in a rigid shell. What the brand publishes about it, the clearance it most likely holds, what a three-minute session implies about dose, and the eye and lip devices beside it.
- Buying guide 10 min read Red light sauna: what the term means, and what dose you actually get Three different products are sold as a red light sauna, and only one of them reliably reaches a studied dose. The difference is distance, and here is the arithmetic.
- Evidence guide 10 min read Red light therapy for hair loss: what the sham-controlled trials show Low-level light therapy has a real sham-controlled literature for pattern hair loss, measured in hairs per square centimetre on tattooed patches of scalp. Here is what those trials found, what the FDA clearance on the box does and does not mean, and what to demand from any cap.
- Evidence guide 11 min read Red light therapy bed: what a session delivers, and what the trials show A red light therapy bed puts LEDs above and below your whole body for 10 to 20 minutes. The published bed trials report a lower irradiance than a good panel at six inches, one sham-controlled fibromyalgia trial is positive, and most recovery trials found nothing. Here is what a bed is, what to ask the clinic, and the safety points that change in an enclosed bed.
- Buying guide 10 min read Red light therapy belts, pads and mats: why LED count tells you nothing about dose A red light belt sits on your skin, so distance stops mattering, and heat, LED spacing and the auto-off timer start to. Almost no belt publishes irradiance at contact, so we worked out the one ceiling the listings let us calculate, and picked four on what they state.
- Evidence guide 11 min read Is red light therapy legit? What the evidence supports, condition by condition Red light therapy is a real field with one guideline-backed use, a handful of conditions where sham-controlled trials agree, and a long tail of claims that rest on a single small study. Here is each one graded, what a home device can realistically deliver, and the side effects worth knowing.
- Buying guide 10 min read Red light therapy glasses: the two numbers the box has to state Red light therapy glasses are only as good as their attenuation at the wavelengths your device emits, usually 660nm red and 850nm near-infrared. Most listings do not state it. Here is why near-infrared is the specific hazard, how to read optical density, and the two pairs we would consider.
- Category guide 9 min read Do red light therapy masks work? The one number no brand publishes Red and near-infrared light has a real published literature for skin. Whether the mask on your face delivers the dose those studies used is a different question, and the answer is usually unknowable — because almost no brand publishes the one figure that decides it.
- Comparison 8 min read Omnilux vs CurrentBody: the same two wavelengths, one published dose, and a third wavelength Omnilux Contour and CurrentBody Series 2 are the two masks most often compared, and on paper they start from the same place: 633 nm red and 830 nm near-infrared. The differences are a third wavelength, LED count, a published irradiance, price and where you can buy each. Plus how both stack up against Shark CryoGlow and Dr. Dennis Gross.
- Evidence guide 10 min read Red light vs blue light therapy: what each one targets, and what the evidence supports Blue light at about 415nm is aimed at acne bacteria near the skin surface. Red light at 630 to 660nm reaches deeper and is studied for skin texture and repair. Here is each one side by side, what the acne trials actually found, why red and blue together is the most studied pairing, and why blue is the one that asks more of your eyes and, for some skin, its pigment.
- Buying guide 10 min read At-home red light therapy devices: the best panels of 2026, judged on irradiance Of every at-home red light therapy device — panel, mask, belt or lamp — the panel is the one that publishes a dose you can check. Most brands still quote solar-meter irradiance figures that over-read by roughly 2x. We ranked the panels on the numbers that survive a spectroradiometer, and on which brands are honest enough to publish both.
- Protocol guide 11 min read How often should you do red light therapy? Dose, distance and time (Sep 2026) Dose equals irradiance times seconds. Get the irradiance figure wrong and every session is wrong. Here is how often, how long, and how far, with the arithmetic that answers 'is 10 minutes enough' exactly.
- Comparison 9 min read Hooga vs Mito Red Light: the bigger number is read on a different instrument Hooga quotes 161 to 189 mW/cm² and Mito quotes more than 70, which makes Hooga look twice as strong. By Hooga's own account its figures come from a consumer meter, the instrument behind Mito's other number of more than 160. Here is the comparison on matched readings, size by size, with prices checked 5 October 2026.
04Build
Recovery Room Builds 4 guides
The part nobody sells you: the 240V circuit, the pad, the drainage, the floor loading, and three itemized builds from about $3,000 to $22,500.
- Install guide 8 min read Sauna electrical requirements: circuits, costs and the questions to ask an electrician What circuit each heater size needs, what the run costs in a US metro, when you need a subpanel, and why the electrical quote should come before the sauna.
- Paying for it 9 min read Is a sauna HSA eligible? The rules for saunas, cold plunges and red light panels IRS Publication 502 does not mention saunas, cold plunges or hot tubs. Eligibility turns on your diagnosis and a Letter of Medical Necessity, not on the seller's badge — and installed equipment faces a capital-expense test most pages leave out.
- Protocol guide 11 min read Sauna or cold plunge first? The contrast protocol, with times and temperatures Heat first, cold last is the convention, and there is a physiological reason for it. Here is the round-by-round protocol with temperatures, what to do if you only have a shower, and the part nobody else writes: how to lay the two out in a home recovery room.
- Build planning 12 min read What sauna installation actually costs: the circuit, the pad and the permit Installation is where recovery room budgets break. The equipment is the part you can look up — this is the 240V circuit, the pad, the drainage and the permit that no brand quotes you, itemized down to the breaker across three complete builds.
05Tools
Recovery Tools 27 guides
Vibration plates, compression boots, massage guns, foam rollers, neck, back, foot and eye massagers, TENS units, PEMF and grounding mats, home hyperbaric chambers, and the sleep-side trends like mouth tape and magnesium spray: what each one does, what the evidence supports, and which spec on the listing matters.
- Buying guide 11 min read The best massage gun is the one that tells you its amplitude A massage gun is a motor and a crank that strikes one spot a few thousand times a minute. How far the head travels decides how deep it reaches, and most listings bury that number. Here is what to read, what the studies found, and where never to point one.
- Buying guide 15 min read A knee brace works for arthritis, barely for runner's knee, and not at all for a meniscus tear. Buy by diagnosis Knee braces are sold as one product for every knee. The evidence splits them hard: a brace has a moderate-strength guideline recommendation for knee osteoarthritis, a very-low-certainty half-point of pain relief for runner's knee, and no trial at all for a degenerative meniscus tear. Here is which type matches which knee, how to size one, what they cannot do, and the six we would buy.
- Evidence and buying guide 16 min read Mouth tape for sleep: does it work, the best tape, and how to use it safely Ten studies, 213 people, all rated poor quality: what mouth taping has and has not been shown to do for sleep, snoring and sleep apnea. Then the tape itself, which on Amazon is mostly wound-care tape, what we would use if you tape at all, and how to do it without sealing your mouth shut.
- Buying guide 15 min read An inversion table opens your lumbar discs by 0.3 to 4 mm and doubles the pressure in your eyes. Both numbers matter Inversion tables are sold on spinal decompression, and the X-rays agree: hanging by your ankles separates the lower lumbar discs by a few millimetres, for as long as you hang. The same posture pushes intraocular pressure from 14 to 36 mmHg and blood pressure to about 146/97 in healthy young men. Here is what the trials found, who the manuals exclude, which ankle locks have hurt people, and which tables we would buy.
- Buying guide 10 min read Grounding mat: what the physics proves, what the studies do not, and the outlet check that comes first A grounding mat is a conductive carbon sheet wired through a resistor to the ground pin of a wall outlet. It does one measurable thing, which says nothing about health, and the health research behind it is small, much of it by researchers who declare ties to the company that sponsors it. It is also only as safe as the outlet it plugs into.
- Buying guide 10 min read The best vibration plate, judged on the specs most listings leave out Four vibration plates that sell well on Amazon, compared on motion type, frequency, amplitude, weight capacity and platform size, with a note on which listing publishes what. Two of the four publish no frequency at all.
- Buying guide 11 min read The best back massager for a chair, a sofa or your shoulders, and what it can do for back pain Three back massagers from the listings, one for each way people use them: strapped to a chair, wedged behind the lower back, or draped over the shoulders. What the low back pain guideline and the Cochrane reviews say a machine like this can do, and who should not use one.
- Evidence guide 10 min read PEMF mat: what the evidence supports, and the specs almost nobody publishes PEMF has a real FDA history, but it belongs to bone-growth stimulators and post-operative devices, not to the mats sold for wellness. Here is what the trials show, the three numbers that would let you compare mats, and why most mats print none of them.
- Evidence guide 11 min read Do vibration plates work? What the trials found, claim by claim Vibration plates have real, modest trial evidence for leg strength, balance and fall rates in older adults, mixed evidence for bone density, and none worth the name for lymphatic drainage, fat loss or cellulite. Here is each claim with the study behind it.
- Buying guide 10 min read Magnesium spray: the best magnesium oil sprays, compared on what you can check Five magnesium sprays compared on the things a label can actually tell you: which salt, how much magnesium per spray, what else is in the bottle, how much it stings, and how big the bottle is. Plus how to use one, how to make your own, and why we do not rank them on absorption.
- Evidence guide 10 min read Magnesium spray benefits: what the evidence says about absorption, sleep and cramps Magnesium spray does put magnesium on your skin. Whether enough of it crosses the skin to matter is the whole question, and the human evidence is a handful of small pilots and a review that calls the idea unsupported. Here is the arithmetic, the studies, and what they mean for sleep, cramps and pain.
- Buying guide 10 min read Compression boots: what they do, whether they work, and which to buy Compression boots squeeze the legs in sequence from foot to thigh. The evidence says they take the edge off soreness for a while and do little else for a healthy athlete. Here is what the specs mean, who should not use them, and which to buy.
- Buying guide 15 min read An ice machine for knee surgery cools the joint less than a bag of ice. That is the point, and it is also the risk A cold therapy machine is a cooler of ice water, a pump, and a pad. In the one trial that measured it, the pad cooled a knee by 7°C at an hour where crushed ice cooled it by 13°C, and hurt less doing it. Across 22 trials after knee replacement, cold therapy cut 48-hour pain by 1.6 points and blood loss by about a cup, at low certainty. The published injuries are frostbite from pads left on for days. Here is how to buy one and how not to burn yourself.
- Buying guide 14 min read The best mattress topper for back pain is medium-firm, not firm. The only trial says so, and the listings say the opposite The one randomised trial of mattress firmness and chronic low back pain put 313 people on firm or medium-firm beds for 90 days; the medium-firm group had twice the odds of less pain in bed and less disability. No trial of a foam topper exists. Here is what that means when you are shopping for a firm mattress topper, how firmness is actually measured, which foams sleep hot and off-gas, when a topper cannot fix a sagging bed, and the six we would buy.
- Buying guide 14 min read The best heated blanket states its temperature range. Most listings do not, and the ones that do run 85 to 126°F A heated blanket is the cheapest way to warm a bed, and the evidence says that is exactly what it is good for: warming the skin shortens the time it takes to fall asleep, and a warm bed that stays warm all night does the opposite. Most listings never say how hot they get. Three do. Here is what the sleep physiology supports, who the manuals exclude, how not to burn yourself, how to wash one, and the six we would buy.
- Buying guide 11 min read The best eye massager, and the eyes that should not wear one Three heated eye massager masks from the listings, chosen for heat you can turn down, pressure you can turn down further, and a cooling option. What the warm-compress research says about dry eyes, what nobody has measured, and why recent eye surgery, glaucoma and sudden vision changes come before any of it.
- Buying guide 14 min read The best massage chair is the one whose track fits your spine, not the one with the most airbags A full-body massage chair is the most expensive thing on our recovery shelf and the least studied. One randomised trial has compared a chair with physiotherapy for low back pain; it lost, narrowly, and the chair's maker helped write it. Here is what the spec sheet words mean, which chairs fit which bodies, who should not sit in one, and what we would buy.
- Buying guide 10 min read The best neck massager, and the part of your neck it should never touch Two corded shiatsu neck massagers from the listings, chosen for pressure you control, heat you can switch off and a 15-minute auto-off. What the neck pain evidence says about massage, why we skipped the electric-pulse collars, and the symptoms that mean a clinician, not a massager.
- Buying guide 15 min read A cervical traction device needs 10 to 25 lb of pull, lying down. A neck stretcher and an inflatable collar give you neither In the one trial that followed people for a year, supine mechanical traction added to exercise beat exercise alone by 13 points of neck disability at six months, and the over-the-door kit did not. The foraminal openings in the neck widen 6% at 11 lb of pull and 17% at 22 lb. An inflatable air collar raised neck muscle activity instead of relaxing it, and no study has measured what it pulls. Here is which type does what, who must not, and the five we would buy.
- Buying guide 10 min read The best TENS unit for home use, and what the evidence says it can do Three TENS units from the listings, judged on the specs that change the experience: channels, adjustable pulse settings, pads and power. Plus the trial evidence for back pain, which is weaker than the packaging suggests.
- Buying guide 10 min read The best foam roller, and what rolling actually does for your muscles Three foam rollers from the listings, chosen by length and firmness, and a routine you can do in ten minutes. The research says the effects are small and short-lived. It is cheap and low-risk, which is why it is still worth owning.
- Cost guide 14 min read Hyperbaric chamber cost: $60 to $650 a clinic session, $4,095 to $29,999 to own one, and the break-even between them Medicare paid about $596 for a covered hospital session in 2022, wellness clinics charge $60 to $150 in a soft chamber and $150 to $600 in a hard one, and a home soft chamber lists at $4,095 to $21,995 on 31 October 2026 before the concentrator and the circuit. Here is every number with its source, the installed cost of three home builds, what a session costs in electricity, what insurance will and will not pay, and the session count at which owning beats renting, with the reason the two are not the same dose.
- Buying guide 9 min read The best foot massager for plantar fasciitis, and what a machine cannot do for it Two foot massagers from the listings, chosen for how they work the arch and heel. A machine can make sore feet feel better while it runs; it does not treat the plantar fascia, and with numb feet the heat setting is a burn risk.
- Buying guide 17 min read Home hyperbaric chamber: what you can legally buy, what it costs with the circuit and the concentrator, and what 1.3 atmospheres is Every soft home chamber with an FDA clearance is cleared for one thing, acute mountain sickness, and sold on prescription; the wellness uses are off-label, and the trials behind them used a hospital dose a soft bag cannot reach. Here is the market on 31 October 2026, from a $4,095 cleared bag to a $29,999 hard shell with no clearance at all, what each needs in the room, the fire and zipper record, and the four we would consider, with the reasons we would not.
- Explainer 14 min read Portable hyperbaric chamber: soft shell vs hard shell, what 1.3 atmospheres actually delivers, and the weights nobody prints A portable hyperbaric chamber is a bag inflated with air to 1.3 to 1.5 atmospheres, the pressure 10 to 16 feet underwater; the bag weighs 26 to 55 lb and the compressor and concentrator it needs add about 80 lb more. Breathing air at 1.3 atmospheres raises the oxygen pressure in your lungs by a third, against ten times in the hard chambers the trials used. Here is soft against hard, line by line: pressure, weight, standards, the oxygen question, the zipper record, and what mild hyperbaric therapy is in numbers.
- Buying guide 13 min read The best heating pad for lower back pain holds 104°F, not 158°F A heating pad is the one recovery tool on this site with a guideline behind it: the American College of Physicians recommends superficial heat for a sore lower back, on moderate-quality evidence. The trials used 104°F for hours. The pads sell on 140 to 165°F. Here is how to buy one, set it, and not burn yourself.
- Evidence guide 16 min read Benefits of hyperbaric oxygen therapy: the 13 uses the FDA has cleared, and what the trials say about everything else The FDA has cleared hyperbaric chambers for 13 conditions, all of them acute or surgical, and none of them the reasons people buy a chamber for the garage. For those reasons the trials exist, and they are not what the brochures say: the Cochrane review of HBOT for sore muscles found more pain at 48 hours, not less; the two Department of Defense concussion trials found the sham group improved as much as the treated one; and the telomere study had 35 people and no control group. Here is each claim beside its trial, with the pressure, the gas and the effect size.
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