Pilates guide

Pilates for detox: what your liver, kidneys and lymph already do, what detox claims get wrong, what Pilates can do, and the evidence

Your body detoxes itself all day: your liver breaks down alcohol, medicines and waste, your kidneys filter your blood, and your lymph nodes filter lymph before it returns to your blood. No study shows Pilates, or any workout, detoxes you or releases toxins, and no study has even tested it.

What Pilates does is move your muscles and your breathing, which moves lymph and blood the ordinary way, as a walk does. Being active is good for your liver, heart and mood, and that's reason enough to do it.

This guide explains what "detox" means, what your liver, kidneys and lymph already do, what the lymphatic detox, sweat, hot Pilates and cortisol claims get wrong, what the Pilates trials did measure, why detox teas and cleanses can harm, and the routine that fits. If you're thinking of stopping alcohol or drugs, start with the warning signs: that kind of detox needs medical help.

The short version

Your body detoxes itself, all day

Your liver breaks down alcohol, medicines and waste; healthy kidneys filter about a half cup of blood every minute; and lymph nodes filter about 4 litres of lymph a day before it returns to the blood. The British Dietetic Association: "The whole idea of detox is nonsense."

Sources 1, 2, 3, 4

No study shows Pilates detoxes anything

Our searches found no study of Pilates and detox, toxins, cleansing or lymph flow: 0 records in each of two medical databases. There's no trial of any commercial detox diet either.

Sources 5, 6

Pilates moves lymph, as any movement does

The lymphatic system has no central pump and relies on the squeeze of working muscles. Steady exercise raised lymph flow about 2 to 3 times in small studies, and a short walk widened the main lymph duct. That's normal circulation, not a flush, and a walk does it too.

Sources 7, 8, 9

The popular claims are untested or wrong

Twists that wring out your organs, sweating out toxins in hot Pilates, rebounding, an "internal shower" and a cortisol detox: none has been tested, and the myths below explain why they don't hold up.

Sources 5, 10, 11, 12

Detox teas, cleanses and over-drinking can do harm

Detox teas are often laxatives, with case reports of salt imbalance, heart problems and liver injury; very low-calorie cleanses cause short-term water loss that comes back; and drinking far more water than you need can be dangerous.

Sources 13, 4, 14

What helps is looking after the organs that do the work

Be active (150 minutes a week plus strength twice a week), keep to the alcohol guidelines and a healthy weight, drink enough, and get medical advice before supplements. Pilates fits as the strength part; our walk and Pilates class adds the brisk walking.

Sources 15, 16, 17, 18

What "detox" means

In medicine, detox is supervised treatment

It means help to come off alcohol or drugs safely, or treatment for a poisoning, such as removing toxic metals, which the US Centers for Disease Control and Prevention recommends only "in some specific serious cases", as the US National Center for Complementary and Integrative Health (NCCIH) notes. That kind of detox needs a doctor: see the alcohol and drugs section below.

Sources 19, 20

In wellness marketing, it's a theory

Diets, teas, cleanses, saunas or workouts said to clear a build-up of unnamed "toxins". The British Dietetic Association describes the theory as "that from time to time you need to clear toxic waste from your body to stay healthy or boost wellness". A review of "alternative detox": "The principles of AD make no sense from a scientific perspective and there is no clinical evidence to support them." (AD is alternative detox).

Sources 4, 21

Which toxins?

Detox marketing rarely names them. Alcohol, medicines, the body's own waste products and chemicals from pollution are real, and they're what the liver and kidneys deal with every day. Where a real poisoning or a chemical exposure at work is suspected, that's a medical matter, not a workout (our reading).

Sources 1, 19

Feeling tired, bloated or puffy is common

It usually has ordinary causes: sleep, food, alcohol, standing still for long, or periods. Bloating and puffy legs have their own guides (our Pilates for bloating and Pilates for lymphatic drainage guides), and new or lasting swelling needs a GP, as the warning signs say.

What your liver, kidneys and lymph already do

The liverStrong evidence

Liver UK: "your liver is also working to detoxify substances which may harm your body such as alcohol, other drugs and some of your body's waste products", and on liver detox diets: "However, you cannot physically detox your liver. There is no evidence that toxins build up in the liver and some of these diets can be dangerous for people with liver disease." Most liver disease causes no symptoms early on; the NHS names obesity, an undiagnosed hepatitis infection and alcohol misuse as the 3 main causes.

Sources 1, 16

The kidneysStrong evidence

"Healthy kidneys filter about a half cup of blood every minute, removing wastes and extra water to make urine.", says the US kidney institute (NIDDK): about 140 litres a day, of which only 1 to 2 litres become urine (our conversion). Kidney disease is usually silent early on and is found by blood and urine tests.

Sources 2, 22

The lymphatic systemStrong evidence

The NHS: "The main functions of the lymphatic system are helping fight infection and draining excess fluid from tissues." The British Lymphology Society calls it "a kind of waste disposal system" whose nodes "filter the lymph and the waste moves on through the body where it is passed in urine". About 8 litres of fluid a day becomes lymph, and after passing through some of the body's 500 to 600 lymph nodes, about 4 litres a day returns to the blood. So lymph does carry waste, and the system handles it without help (our reading).

Sources 23, 24, 3

The lungs, gut and skin

The British Dietetic Association says the skin, gut, liver and kidneys continually remove the body's waste. The lungs breathe out carbon dioxide; sweat is mainly for cooling and is mostly water and salt, as our hot yoga and kidney health guides say.

Source 4

When the body can't clear things normally

Liver or kidney disease, lymphoedema, and heart failure with fluid build-up are medical conditions, and the answer is care and the condition's own guide (our Pilates for fatty liver, yoga for kidney health, Pilates for lymphoedema and Pilates for heart failure guides), not a detox plan.

How lymph moves, and where Pilates fits

The lymph flow figures come from small physiology studies, several read only as abstracts. They measure vessel width, pumping or tracer clearance, not how much waste is removed.

No central pumpStrong evidence

The NHS: "Unlike blood circulation, the lymphatic system has no central pump, such as the heart, to move fluid to the lymph glands. Instead, it uses the massaging effect of surrounding muscles to move the fluid. This is why exercise is important." The larger lymph vessels also pump by themselves, and how much the muscles add "is not known with any accuracy". The British Lymphology Society: "Without movement, lymphatic vessels collapse."

Sources 7, 3, 24

Working muscles speed lymph upEmerging evidence

In 8 men, 100 thigh contractions sped up the clearance of a tracer from the muscle: "Exercise increased the clearance rate three- to sixfold". "During steady-state exercise in humans, lymph flow has been shown to increase to levels approximately 2- to 3-fold higher than at rest." In a 1977 study, leg lymph flow rose by 83% during two hours of cycling.

Sources 25, 8, 26

Walking, breathing and standingEmerging evidence

In 20 healthy adults, 15 minutes of slow treadmill walking widened the end of the main lymph duct from 2.7 to 3.4 mm; deep breathing at rest changed it little. In 17 young adults, leg lymph vessels pumped more often within 3 minutes of standing up. Cancer Research UK: "Deep breathing exercises help the flow of the lymph fluid through the body."

Sources 9, 27, 28, 29

No study of Pilates and lymph flow

Our searches found no study measuring lymph flow, toxins or detoxification during Pilates, and nothing new since our lymphatic drainage guide was written beyond the same walking study and studies in people with lymphoedema or heart conditions.

Sources 5, 30

So: Pilates moves lymph the ordinary way

A Pilates class supplies what moves lymph: muscles squeezing and relaxing (leg circles, knee folds, side kicks, standing work), deeper breathing and changes of position. Long holds such as planks pump less than moving work, because pumping needs a squeeze and a release. A walk does the same job, and nothing shows a Pilates routine clears "toxins" (our reading). Our Pilates for lymphatic drainage guide has the detail.

Sources 25, 8, 9, 5

The detox claims, checked

"Lymphatic detox": flushing toxins out of your lymphEmerging evidence

Your lymph nodes filter lymph all the time, and about 4 litres a day returns to the blood whatever you do; the liver and kidneys then clear what reaches it. No study has measured toxins in lymph during Pilates. A healthy system doesn't need a detox, as our lymphatic drainage guide says.

Sources 3, 5

Twists that "wring out" your organs

No study has tested any Pilates or yoga move on organ function or detox, as our digestion and fatty liver guides also say. Twists are fine to do if they feel good; they work your trunk muscles and your breathing.

Source 5

Joseph Pilates' "internal shower"

A studio blog quotes his 1945 book: "Contrology exercises purify the blood in the bloodstream". We couldn't open the book itself, so this is a quotation at second hand. It was his belief, not a finding, and no study has measured it.

Sources 31, 5

Sweating out toxins, and hot PilatesMixed evidence

Sweat carries traces of toxic metals, but the studies are small, measure concentrations in small samples of sweat rather than how much leaves the body, and collected sweat in ways that "varied widely". The review that gathered them asked for proper trials, and we found none. That sweating doesn't meaningfully lower the body's load is our reading of these studies; the one published critique we found couldn't be opened. No study has tested hot Pilates at all.

Sources 12, 32, 33, 10

Rebounding on a mini-trampoline

No study has tested rebounding on lymph flow or detox in people. A McGill University science writer found that the 1980 NASA study of astronauts' exercise that promoters cite had "no measure of lymph flow or of accumulation of waste products" (a science-communication article, not peer reviewed).

Sources 11, 34

A "cortisol detox"Mixed evidence

Cortisol is a stress hormone your body regulates; it isn't a toxin. Small Pilates studies found it lower after 4 weeks in a single group of women, higher after 8 weeks in a trial of 27 older women that also reported implausibly large gains elsewhere, and unchanged in 36 cancer survivors. Pilates may help you feel calmer; our Pilates for stress and anxiety guide covers that.

Sources 35, 36, 37, 38

What Pilates trials did measure

All of these trials are small and short, several from single centres and read only as abstracts, and none measured detoxification.

Oxidative stress ("antioxidant" claims)Mixed evidence

In 44 people with type 2 diabetes, 8 weeks of Pilates lowered long-term blood sugar and one oxidative stress marker. In 44 women after the menopause, 12 weeks of mat Pilates left most of these markers unchanged; in 36 women with nerve damage from diabetes, antioxidant capacity rose in every group, most with dark chocolate before Pilates; and in a 2-week study of healthy women, an antioxidant enzyme fell. Mixed, tiny, and none of it is detox.

Sources 39, 40, 41, 42, 43

The liverMixed evidence

In 32 women with fatty liver, 8 weeks of Pilates, with or without a broccoli sprout extract, "did not significantly alter hepatic enzyme levels". Our Pilates for fatty liver guide covers the other tiny trials, and being active does lower liver fat.

Sources 44, 45

The kidneysMixed evidence

Two small trials from one group, in 50 people on dialysis and 50 with chronic kidney disease, reported better general health and quality of life scores with a modified Pilates programme. In 56 people in hospital with kidney disease, Pilates and usual physiotherapy did equally well. None measured kidney function.

Sources 46, 47, 48, 49

Rehabilitation after drug detoxEmerging evidence

In 43 people in a drug rehabilitation centre, 24 weeks of twice-weekly Pilates improved fitness, body fat, lung capacity and anxiety and depression scores more than usual rehabilitation. That's recovery after detox, not detox itself.

Source 50

LymphoedemaMixed evidence

Exercise, Pilates included, is safe and recommended with lymphoedema, but whether it reduces swelling is very uncertain: across 36 studies, exercise didn't change lymphoedema against usual care while pain, function and strength improved; in 69 women after breast surgery, mat Pilates improved arm movement and strength but not arm volume; and an overview warned that "the absence of adverse events does not confirm safety". That's lymphoedema care, owned by our Pilates for lymphoedema guide; it says nothing about detoxing healthy people.

Sources 51, 29, 52, 53, 54

Detox teas, cleanses and water flushes

No trials of the products

"To the best of our knowledge, no randomised controlled trials have been conducted to assess the effectiveness of commercial detox diets in humans." The few clinical studies "are hampered by flawed methodologies and small sample sizes", and NCCIH says the studies "have been of low quality".

Sources 6, 19

The weight lost is water, and comes backEmerging evidence

"Rapid weight loss can occur, but this weight loss is largely water and glycogen (the body's carbohydrate stores), rather than fat." (the British Dietetic Association). Detox diets work only by very low calorie intake for a short time, and tend to lead to weight gain once normal eating resumes.

Sources 14, 4

Detox teas are often laxativesEmerging evidence

A 2026 review of 10 mostly low-level studies found "limited support for weight loss benefits", and case reports of salt imbalance, heart problems and liver injury in otherwise healthy people; in one analysis, "91.7% of these teas contained senna leaf, a laxative". The British Dietetic Association: "Products like detox teas work by acting as a laxative, which is not without risk."

Sources 13, 4

Colon cleansingStrong evidence

A systematic review found "no methodologically rigorous controlled trials of colonic cleansing to support the practice for general health promotion", and "multiple case reports and case series that describe the adverse effects". A 2010 correction changed one table entry, not the conclusions.

Source 55

What the professional bodies sayStrong evidence

"Detox diets are a marketing myth rather than nutritional reality." (the British Dietetic Association); "you cannot physically detox your liver" (Liver UK). UK advertising guidance says detox and lymphatic drainage claims need robust evidence before they're made.

Sources 4, 1, 56

Drinking far more water doesn't flush anythingStrong evidence

The NHS says most people should drink enough that "their pee is a clear pale yellow colour", about 6 to 8 cups or glasses of fluid a day, more in the heat or when active for long. The British Dietetic Association warns that "drinking too much water can be as dangerous as not drinking enough": in one case report, a woman drank 3.5 litres after a 90-minute hot yoga class, her blood sodium fell and she had a seizure.

Sources 17, 4, 57

What actually helps your liver and kidneys

Be active, and do strength workStrong evidence

The NHS advises 150 minutes of moderate activity a week plus strength work on 2 days. Pilates counts as the strength part; brisk walking does more for the minutes. For fatty liver, exercise lowers liver fat even without weight loss, as our Pilates for fatty liver guide explains.

Source 15

Look after your liverStrong evidence

The NHS's list for preventing liver disease: keep to the alcohol guidelines, keep to a healthy weight, and get the hepatitis vaccines if you're at risk.

Source 16

Drink enough, not moreStrong evidence

Enough to keep your pee pale yellow; more in hot weather, when you're active for a long time, or when you're ill.

Source 17

Medicines and supplementsStrong evidence

Don't stop prescribed medicines or start supplements without advice: the NHS advises people at risk of kidney injury to "speak to a doctor before taking any new medicines or supplements".

Source 18

Breathe deeply

Lateral breathing: 5 to 8 breaths at the start of every session (from the move page's dose); breath reach: 5 breaths, exhale longer than inhale (the move page's dose); slow breathing: 5 breaths, or longer as a calm-down at the end (our Pilates for lymphoedema class). Deep breathing helps lymph move; it doesn't detox anything.

Pump the legs

March on the spot: 2 min, arms swinging (our walk and Pilates workout); slow calf raise: 10, knee fold: 6 each side, heel slide: 8 each side, and sit to stand: 8 (all our Pilates for lymphoedema class); single-leg circle: 5 circles each direction, each leg (the classical sequence uses 5), and ankle circles: 10 slow circles each way with each foot (our editorial starting point) (both from the move pages' doses). Working calf and thigh muscles squeeze lymph and blood upwards.

Work the big muscles

Wall bridge: 8, band row: 1 set of 8 to 10 with the lightest band, and wall push-up: 1 set of 8 (all our Pilates for lymphoedema class); side kick: 8 each side, moving rather than held, and swimming: 20 s (both our walk and Pilates workout). Strength work twice a week is part of what protects your health, the liver included.

Move the spine, for comfort

Cat-cow: 8 waves, slower than feels natural (the move page's dose); spine twist: 3 to 4 each side (the classical sequence uses 3) (from the move page's dose); mermaid: 3 each side, on a chair if the floor is hard to get down to (our Pilates for lymphoedema class). Twists and side bends feel good; they don't wring out or detox your organs.

Walk

Brisk walk: 20 min, outdoors or on a treadmill, at a pace where you can talk but not sing (our walk and Pilates workout). The part that does most for your weekly activity.

Change or leave out

Our suggestions, unless a source is given.

No "detox" sequence of inversions or deep twists

The roll-over, jack knife and corkscrew don't drain anything, and their move pages carry neck, osteoporosis and glaucoma cautions; leave them to our classical mat exercises guide.

No heat

No study has tested hot Pilates, and with lymphoedema, the NHS says heat may increase the swelling. See the heat and water lines below.

Sources 10, 58

With lymphoedema

Use our Pilates for lymphoedema class and your lymphoedema team's advice. The class says: "Wear your compression garment if you've been given one, unless your lymphoedema team says otherwise."

With osteoporosis

Twist smoothly and only as far as is comfortable, as the spine twist's page says, and keep your head down in the hundred, as our walk and Pilates workout advises.

Holding your breath

Breathe out as you lift, and don't hold your breath.

Classes to follow

Our walk and Pilates workout is the honest routine for this page: a 2-minute march, a 20-minute brisk walk and a short Pilates circuit, so you get the walking and the strength work in one go. It isn't a detox class, and no class is. The morning and bedtime classes are short ways to move and breathe; the lymphoedema class is for people with lymphoedema or at risk after cancer treatment, through our Pilates for lymphoedema guide.

Plans

The 4-week Pilates plan and the walking challenge build the habit step by step. Neither promises a detox.

Detox from alcohol or drugs is medical care

Don't stop drinking suddenly on your own if you're dependent

The NHS says: "It can be very dangerous to stop drinking suddenly if you're dependent on alcohol. If you get withdrawal symptoms, get medical help before you try to stop drinking." A GP or an alcohol support service can help you stop safely (our suggestion).

Source 20

Severe withdrawal: call 999

Call 999 or go to A&E if you or someone else has severe withdrawal symptoms after stopping drinking, such as shaking visibly, being unusually restless, irritable or upset, confusion, seeing, hearing or feeling things that aren't there, or a seizure. Don't drive yourself (our suggestion, from the NHS alcohol misuse page).

Source 20

Where to get help

The NHS lists Drinkline, "the national alcohol helpline", which is free and confidential: "Call 0300 123 1110 (weekdays 9am to 8pm, weekends 11am to 4pm)."

Our yoga for addiction recovery guide lists more places to get help with alcohol or drugs.

Source 59

Pilates afterwardsEmerging evidence

Pilates can be part of recovery: in one trial in a drug rehabilitation centre, 24 weeks of Pilates improved fitness and mood scores. It doesn't replace medical care to stop.

Source 50

Who should change what

Lymphoedema, or swelling after cancer treatment

Signs of infection (cellulitis) or a blood clot in a swollen limb need urgent medical attention. If the swollen or at-risk area changes during or after exercise, stop and contact your lymphoedema specialist.

Our lymphoedema class says: "Red, hot, painful or suddenly more swollen skin, or feeling hot, cold and shivery, can be cellulitis: stop, rest and raise the limb, and get an urgent GP appointment or call NHS 111 the same day."

Source 29

Liver or kidney disease, heart failure, or after cancer treatment

Use the guide for your condition and your team's advice; this page gives no medical routine (our suggestion).

A hot room

In a hot room, drink to replace what you sweat, not far more, and stop and cool down if you feel dizzy, sick, faint or confused (our suggestion, from the NHS water page and a case of dangerously low blood sodium after hot yoga).

Sources 57, 17

Pregnancy

In pregnancy, after the first trimester, keep time flat on your back to a few minutes: prop your upper body up, or use a side-lying or all-fours version.

Living with a higher weight

Start where you're comfortable: chair, wall and standing versions all count. Our Pilates for plus-size bodies guide covers getting up and down from the floor and the equipment that helps.

Warning signs: when to get help

These are the warning signs of our lymphatic drainage and Pilates guides, word for word, with new lines in the NHS's words marked as our suggestion. This is general information, not a diagnosis. A&E means accident and emergency; in the US, call 911 for 999, and use your doctor's urgent line or urgent care for NHS 111.

Call 999 (911 in the US) or go to A&E

If you have cellulitis with any of these, which can be signs of sepsis:

  • A very high temperature, or feeling hot, cold or shivery.
  • A fast heartbeat or fast breathing.
  • Purple patches on the skin (these may be harder to see on brown or black skin).
  • Feeling dizzy or faint, or confused.
  • Cold, clammy or pale skin, or not responding.

Source 60

Severe alcohol withdrawal: call 999

Call 999 or go to A&E if you or someone else has severe withdrawal symptoms after stopping drinking, such as shaking visibly, being unusually restless, irritable or upset, confusion, seeing, hearing or feeling things that aren't there, or a seizure. Don't drive yourself (our suggestion, from the NHS alcohol misuse page).

Source 20

Yellow skin or eyes: the same day

If your skin or the whites of your eyes look yellow, perhaps with itchy skin, darker pee and paler poo than usual, ask for an urgent GP appointment or get help from NHS 111. The NHS says jaundice "can be a sign of something serious, such as liver disease" (our suggestion, from the NHS jaundice page).

Source 61

Signs of kidney injury: the same day

Ask for an urgent GP appointment or get help from NHS 111 if you think you may have acute kidney injury. The NHS lists peeing a lot less than usual, feeling very thirsty, feeling or being sick, swollen feet or legs, feeling tired, dizzy, confused or sleepy, and feeling breathless, especially when you lie down, though many people have no symptoms (our suggestion, from the NHS page).

Source 18

Urgent GP appointment or NHS 111, the same day

  • The skin of the swollen or at-risk area is painful, hot and swollen, perhaps red (harder to see on brown or black skin), or you feel unwell with flu-like symptoms: this can be cellulitis, and early antibiotics help.
  • Throbbing pain and swelling in one limb with red, blue or darkened skin or swollen veins, which can be a DVT (it can happen in an arm too).
  • Antibiotics for cellulitis aren't helping after 48 hours.

Sources 60, 62

A swollen, painful leg

Same day (urgent GP appointment or NHS 111): throbbing pain in one leg (rarely both), usually the calf or thigh; swelling in one leg (rarely both); red, blue or darkened skin around the painful area, which may be harder to see on brown or black skin; or swollen veins. This can be a deep vein thrombosis (DVT). It is more likely after surgery, a hospital stay, 3 or more days in bed, a journey of over 4 hours, pregnancy or a recent birth, cancer, a previous clot, or contraception or hormone replacement therapy (HRT) that contains oestrogen.

Source 62

See a GP

  • If you think you might have liver disease: most types cause no symptoms early on, and the NHS lists feeling very tired and weak all the time, loss of appetite, yellow skin and whites of the eyes, itchy skin, and feeling or being sick among the symptoms of cirrhosis (our suggestion, from the NHS liver disease page).
  • Swelling in an arm or leg that doesn't go away: the NHS says to see a GP with the typical symptoms of lymphoedema, "such as swelling in your arms and legs", and a GP may refer you to a specialist lymphoedema treatment centre (our suggestion, from the NHS lymphoedema page).

Sources 16, 23

Swollen glands

Swollen lymph nodes aren't something to stretch or drain away. See a GP if they're getting bigger or haven't gone down within 1 week, feel hard or don't move, come with night sweats or a very high temperature, or are just above or below your collarbone.

Source 63

Laxatives and detox teas

The NHS says: "If you bought laxatives without a prescription, stop taking them when your constipation improves and do not take them for longer than 7 days." Many detox teas contain a laxative such as senna, so the same applies to them (our suggestion).

Sources 64, 13

Signs of an eating disorder

The NHS lists spending a lot of time worrying about your weight and body shape, avoiding socialising when food might be involved, eating very little, making yourself sick or taking laxatives, exercising too much, very strict habits around food, and changes in mood. See a GP as soon as you can, or call Beat on 0808 801 0677.

Source 65

Too much water

Don't drink far more than you need to flush anything out: the British Dietetic Association warns that "drinking too much water can be as dangerous as not drinking enough". Drink enough that your pee is pale yellow, and more in the heat or during long activity, as the NHS advises (our suggestion).

Sources 17, 4

Chest pain or fainting while exercising: call 999

Call 999 if:

  • You get sudden pain or discomfort in your chest that doesn't go away; it can feel like squeezing or pressure, burning or indigestion.
  • The pain spreads to your left or right arm, or your neck, jaw, stomach or back.
  • You have chest pain and feel sweaty, sick, light-headed or short of breath.
  • Someone faints while exercising, can't be woken within 1 minute, or has chest pain or a pounding, fluttering or irregular heartbeat.

Sources 66, 67, 68

Unusual breathlessness

Call 999 or go to A&E (accident and emergency) straight away for severe difficulty breathing (gasping, choking or not able to get words out), a chest that feels tight or heavy, pain that spreads to your arms, back, neck and jaw, lips or skin turning very pale, blue or grey, or sudden confusion. If you're more short of breath than usual, or your heart is racing, fluttering or skipping beats, contact NHS 111.

Source 69

A heart condition

If you have a heart condition, follow your cardiac team's advice on how hard to work, and stop for the warning signs above. People with long-term conditions may wish to ask their specialist before starting. With uncontrolled high blood pressure, avoid straining against a held breath; the high blood pressure guide has more.

Older adults

See your GP first if you get chest pain, breathlessness or dizziness when you are active, if you have a heart condition and want to exercise harder, or if you have had a fall.

Source 70

Stop the session if

You feel any pain or become unwell, as the NHS advises for its Pilates videos, and especially for chest pain or pressure, unusual breathlessness, dizziness or fainting. If you have a health problem, an injury or any symptoms, get advice from a healthcare professional, such as a GP, before you start.

Source 71

Before you start

The NHS advises getting advice from a healthcare professional first if you have a health problem, an injury or symptoms, or have recently had a heart attack or an operation.

If you have a heart, lung or joint condition, are pregnant or have recently been unwell, start gently and read our guide for your condition. Muscle soreness for a day or two after a new exercise is common and fades as you repeat it.

Source 71

Myths

"Pilates flushes toxins out of your lymph"Emerging evidence

No study has measured toxins, detoxification or lymph flow during Pilates. Working muscles and steady exercise do speed lymph, and walking widened the main lymph duct, but your lymph nodes filter lymph all the time and about 4 litres a day returns to the blood whatever you do.

Sources 5, 8, 9, 3

"The twists and curls massage your organs"

Untested: no study has tested any Pilates or yoga move on organ function or detox.

Source 5

"Joseph Pilates said it gives you an internal shower"

He wrote that his exercises purify the blood, but that was his belief in 1945, quoted here at second hand, and no study has measured it. Our Pilates for circulation guide says the same.

Sources 31, 5

"Sweat out toxins in a hot Pilates class"Mixed evidence

Sweat carries traces of metals, but the studies are small and measure concentrations, not how much leaves the body (our reading), and no study has tested hot Pilates. Heat and over-drinking carry real risks.

Sources 12, 32, 33, 10, 57

"Rebounding detoxes your body"

No study has tested rebounding on lymph flow or detox in people, and the NASA study promoters cite didn't measure lymph.

Sources 11, 34

"Detox teas, juice cleanses and fasting boost a Pilates detox"Strong evidence

There are no trials of commercial detox diets, the weight lost comes back, and detox teas are often laxatives with case reports of salt imbalance, heart problems and liver injury.

Sources 6, 14, 13, 4

"Drink as much water as you can to flush out toxins"Strong evidence

Drink to keep your pee pale yellow; drinking far more than you need can be dangerous.

Sources 17, 4

"A cortisol detox class"Mixed evidence

No such thing: cortisol is a hormone your body regulates, and small Pilates studies found it lower, higher or unchanged.

Sources 35, 36, 37

"You need a special lymphatic detox routine"

Any movement and deep breathing help lymph move; mat, chair, wall and reformer Pilates all count, and so does a walk.

Sources 29, 7

"If you feel worse on a detox, the toxins are leaving"

Headaches, dizziness and tiredness on a cleanse are what the British Dietetic Association describes from eating very little: "You may feel tired and dizzy, irritable, unable to concentrate" (our reading). Feeling unwell during exercise is a reason to stop.

Source 4

Questions people ask

Does Pilates detox your body?

No study shows that it does, and no study has even measured it. Your liver, kidneys, gut, lungs and lymph nodes clear waste all day without help, and the British Dietetic Association calls the idea of detox nonsense. Pilates is still worth doing, because being active is good for your heart, muscles, mood and liver.

Does Pilates release toxins?

No. Nothing shows that any Pilates move releases or flushes toxins, and the people who make these claims rarely say which toxins they mean. What Pilates does is work your muscles and your breathing, which moves lymph and blood as any activity does.

Is Pilates good for lymphatic detox?

It helps lymph move, because working muscles and deeper breathing squeeze the lymph vessels: steady exercise raised lymph flow about 2 to 3 times in small studies. But a healthy lymphatic system doesn't need a detox: about 4 litres of lymph a day returns to your blood anyway, filtered by your lymph nodes. Our Pilates for lymphatic drainage guide covers how lymph moves.

Do twists or the hundred wring out or massage your organs?

No study has tested that. Twists and curls are fine to do if they feel good; they work your trunk muscles and your breathing, not your liver or kidneys. Joseph Pilates believed his exercises gave the blood an internal shower, but that was his 1945 belief, not a finding.

Does hot Pilates sweat out toxins?

No study has tested hot Pilates. Sweat is mostly water and salt; it carries traces of metals, but the studies are tiny and haven't shown that sweating lowers the body's load or improves health. In the heat, drink to replace what you lose, not more, and stop if you feel dizzy, sick or confused.

Should I do a juice cleanse or detox tea with my Pilates?

No. There are no trials of commercial detox diets, the weight lost is mostly water and comes back, and detox teas are often laxatives linked in case reports with salt imbalance, heart problems and liver injury. If you take laxatives to control your weight, see a GP or talk to Beat.

Does drinking lots of water flush out toxins?

Not beyond what your kidneys already do. Drink enough that your pee is pale yellow, which for most people is 6 to 8 cups or glasses of fluid a day, more in the heat or after a long workout. Drinking far more than you need can lower your blood sodium dangerously.

Is Pilates good for the liver?

Being active lowers liver fat, even without weight loss, and Pilates can be the strength part of your week; our Pilates for fatty liver guide has the evidence. The few Pilates trials in fatty liver are tiny, and one found no change in liver enzymes after 8 weeks. No move detoxes the liver: Liver UK says you cannot physically detox it.

Is Pilates good for the kidneys?

Exercise is good for people with kidney disease, and small trials found Pilates improved quality of life in people on dialysis, without measuring kidney function. It doesn't flush or detox the kidneys. Our yoga for kidney health guide covers exercise with kidney disease and dialysis.

Can Pilates help with an alcohol or drug detox?

It can be part of recovery afterwards: in one trial in a drug rehabilitation centre, 24 weeks of Pilates improved fitness and mood scores. But stopping alcohol suddenly can be dangerous if you're dependent, so get medical help first, as the NHS advises. Our yoga for addiction recovery guide lists where to get help.

Is there a cortisol detox workout?

No. Cortisol is a stress hormone your body regulates, and small Pilates studies found it lower, higher or unchanged. Slow breathing and gentle movement can help you feel calmer; our Pilates for stress and anxiety guide covers that.

What actually helps my body clear waste?

Looking after the organs that do it: keep to the alcohol guidelines, stay active (150 minutes a week plus strength twice a week), keep to a healthy weight, drink enough, and don't start supplements or stop medicines without advice. Yellow skin or eyes, peeing much less than usual, or new swelling need a doctor, not a detox.

Sources

  1. Liver UK (formerly the British Liver Trust) · Diet and liver disease, on liver detox diets
  2. US National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) · Your kidneys and how they work
  3. Moore 2018 · How lymph flows (review, Annu Rev Fluid Mech; read in full)
  4. British Dietetic Association · Detox diets (food fact sheet, 2025)
  5. PubMed · Our searches for Pilates and detox, toxins, cleansing or lymph flow in PubMed and Europe PMC (4 November 2026): 0 records in each
  6. Klein 2015 · Detox diets for removing toxins and losing weight (critical review, J Hum Nutr Diet)
  7. NHS · Lymphoedema: treatment (past its review date: reviewed March 2023, review due March 2026)
  8. Lane 2005 · Exercise and the lymphatic system (review, Sports Med)
  9. Shinaoka 2025 · The main lymph duct on ultrasound during walking and breathing in 20 adults (laboratory study, Sci Rep; read in full)
  10. PubMed · Our search for hot or heated Pilates (4 November 2026): 0 records in PubMed; 4 in Europe PMC, none a study of hot Pilates
  11. PubMed · Our search for rebounding or trampolining and lymph or detox (4 November 2026): 35 records in PubMed and 16 in Europe PMC, none testing rebounding on lymph flow or detox in people
  12. Sears 2012 · Arsenic, cadmium, lead and mercury in sweat (systematic review, J Environ Public Health; read in full)
  13. Noor 2026 · Diet and detox teas for weight loss: safety and effectiveness (mini-review, Front Nutr; read in full)
  14. Obert 2017 · Four popular weight loss strategies, detox diets included (review, Curr Gastroenterol Rep)
  15. NHS · Physical activity guidelines for adults aged 19 to 64
  16. NHS · Liver disease (past its review date: reviewed August 2023, review due August 2026)
  17. NHS · Water, drinks and hydration (past its review date: reviewed May 2023, review due May 2026)
  18. NHS · Acute kidney injury (AKI)
  19. US National Center for Complementary and Integrative Health (NCCIH) · Detoxes and cleanses: what you need to know (updated March 2025)
  20. NHS · Alcohol misuse
  21. Ernst 2012 · Alternative detox (review, Br Med Bull)
  22. NHS · Chronic kidney disease: overview (past its review date: reviewed March 2023, review due March 2026)
  23. NHS · Lymphoedema: overview (past its review date: reviewed March 2023, review due March 2026)
  24. British Lymphology Society · What is lymphoedema?
  25. Havas 1997 · Lymph flow from working thigh muscles in 8 men (laboratory study, J Physiol)
  26. Olszewski 1977 · Leg lymph flow during muscle activity in healthy men (laboratory study, Acta Physiol Scand)
  27. Hinton 2022 · Breathing, body position and the main lymph duct on ultrasound (exploratory study, Clin Anat)
  28. Holm-Weber 2022 · Standing up and leg lymph vessel pumping in 17 young adults (laboratory study, Physiol Rep; read in full)
  29. Cancer Research UK · Exercise, positioning and lymphoedema
  30. Europe PMC · Our search for exercise, walking or breathing and lymph flow in people, 2022 to 2026 (4 November 2026): 44 records; one new study in healthy people, the rest in lymphoedema or heart conditions
  31. Flow Pilates and Wellness · April showers (a studio blog quoting Joseph Pilates' Return to Life, 1945, on the internal shower; a secondary quotation)
  32. Genuis 2011 · Toxic elements in blood, urine and sweat in 20 people (study without a comparison group, Arch Environ Contam Toxicol)
  33. Kuan 2022 · Metals in sweat from exercise or a sauna in 12 students (laboratory study, Int J Environ Res Public Health; read in full)
  34. Jarry 2023 · A trampoline to detox is a bad idea (science-communication article, McGill University Office for Science and Society; not peer reviewed)
  35. Onu 2026 · Four weeks of Pilates and stress hormones in previously inactive women (study without a comparison group, Life)
  36. Farzane 2022 · Pilates and hormones in 27 older women (randomised trial, J Sports Med Phys Fitness)
  37. Abdul Razak 2024 · Pilates and salivary cortisol in 36 bowel cancer survivors (quasi-experimental study, Asian Pac J Cancer Prev)
  38. PubMed · Our search for Pilates and cortisol (4 November 2026): 9 records in PubMed and 11 in Europe PMC
  39. Gouveia 2021 · Pilates, blood sugar and oxidative stress in 44 people with type 2 diabetes (randomised trial, J Bodyw Mov Ther)
  40. Amaral 2022 · Mat Pilates and oxidative stress markers in 44 women after the menopause (trial, Antioxidants)
  41. Fakhari 2021 · Pilates and dark chocolate in 36 women with diabetic nerve damage (trial, J Bodyw Mov Ther)
  42. Gronesova 2018 · Two weeks of Pilates and blood markers in healthy women (study without a comparison group, Gen Physiol Biophys)
  43. PubMed · Our search for Pilates and oxidative stress or antioxidant markers (4 November 2026): 8 records in PubMed; 7 in Europe PMC (4 small trials, 3 reviews)
  44. Ghorbanian 2026 · Broccoli sprout extract and Pilates and liver enzymes in 32 women with fatty liver (trial, Plant Foods Hum Nutr)
  45. PubMed · Our search for Pilates and the liver, fatty liver or liver enzymes (4 November 2026): 2 records in PubMed and 4 in Europe PMC, one of them a trial
  46. Rahimimoghadam 2017 · Pilates and general health in 50 people on dialysis (trial, J Bodyw Mov Ther)
  47. Rahimimoghadam 2019 · Pilates and quality of life in 50 people with chronic kidney disease (trial, Complement Ther Clin Pract)
  48. Sarmento 2017 · Physiotherapy or Pilates in 56 people in hospital with kidney disease (trial, Clin Rehabil)
  49. PubMed · Our search for Pilates and the kidneys or dialysis (4 November 2026): 6 records each in PubMed and Europe PMC, none measuring kidney function
  50. Ji 2025 · Pilates in 43 people in drug rehabilitation (randomised trial, BMC Psychiatry)
  51. British Lymphology Society · Lymph facts: movement and physical activity
  52. Aguilera-Eguia 2026 · Exercise for arm lymphoedema after breast cancer: 9 reviews (overview of reviews, J Clin Med; read in full)
  53. Hayes 2022 · Exercise to prevent and treat cancer-related lymphoedema, 36 studies (systematic review and meta-analysis, Med Sci Sports Exerc)
  54. Boing 2026 · Pilates or dance and arm function after breast cancer surgery in 69 women (randomised trial, Support Care Cancer; read in full)
  55. Acosta 2009 · Colon cleansing for general health (systematic review, Am J Gastroenterol; a 2010 corrigendum corrects one table entry)
  56. Committee of Advertising Practice and Advertising Standards Authority · Health: detoxing and lymphatic drainage (advertising guidance)
  57. Reynolds 2012 · Low blood sodium and a seizure after drinking water at hot yoga (case report, BMJ Case Rep)
  58. NHS · Lymphoedema: prevention (past its review date: reviewed March 2023, review due March 2026)
  59. NHS · Alcohol support (Drinkline and other helplines)
  60. NHS · Cellulitis
  61. NHS · Jaundice
  62. NHS · DVT (deep vein thrombosis)
  63. NHS · Swollen glands (past its review date: reviewed September 2023, review due September 2026)
  64. NHS · Laxatives
  65. NHS · Eating disorders: overview
  66. NHS · Chest pain (past its review date: reviewed August 2023, review due August 2026)
  67. NHS · Heart attack
  68. NHS · Fainting
  69. NHS · Shortness of breath
  70. NHS · Physical activity guidelines for older adults
  71. NHS · Pilates for beginners, with its safety advice

Exercise education, not a personal prescription, and clinical review of these guides is pending. If you are pregnant, have a health condition or have had recent surgery, check with a doctor, midwife or physiotherapist before starting, and stop for sharp or increasing pain. Health disclaimer.