Managing PoTS — Exercise, Salt, Fluids & Medications

Exercise & rehabilitation

Exercise is the most evidence-based treatment for PoTS

A structured exercise programme — starting with recumbent (lying-down) exercise and gradually building up — has been shown to improve heart rate control, increase blood volume, and significantly reduce symptoms over 3–6 months.[1]

The key insight is that PoTS is partly a deconditioning syndrome: the heart and blood vessels adapt poorly to an upright posture, and regular exercise reverses this. However, the wrong kind of exercise can make things worse — upright, high-intensity exercise early in the programme is often poorly tolerated.

This programme is based on the protocol developed by Dr Benjamin Levine at UT Southwestern, which is the most rigorously studied approach in PoTS.[1]

Before starting: Discuss this programme with your GP or specialist first. If you also have ME/CFS, post-exertional malaise (PEM) is a contraindication to graded exercise — please seek specialist advice.

Programme targets

3–4× sessions per week

30–45 minutes per session (target)

3 months to significant benefit

75–85% max HR target zone

The three-phase programme

Build up gradually — week by week

Recumbent phase

Weeks 1–4

Rowing machine (seated/recumbent)
Recumbent cycling
Swimming (horizontal)
Water aerobics
Start with 15–20 min sessions
Low intensity: conversation should be possible

Frequency: 3× per week

Transition phase

Weeks 5–8

Continue recumbent exercise
Add strength training (seated where possible)
Begin upright walking — short, flat distances
Increase duration to 25–35 min
Moderate intensity: slightly breathless but talking
Monitor HR — stop if >170 bpm or severe symptoms

Frequency: 3–4× per week

Upright phase

Weeks 9–12+

Upright cycling or elliptical trainer
Brisk walking, light jogging
Increase to 30–45 min sessions
Higher intensity: 75–85% of max HR
Add weight training — lower body focus
Continue long-term — benefits diminish if stopped

Frequency: 4–5× per week

What to do and what to avoid

Activity	Status	Why
Swimming	Good early on	Horizontal position reduces orthostatic load. Water pressure helps venous return.
Rowing machine	Good early on	Recumbent position, full-body aerobic workout without the demands of standing.
Recumbent bike	Good early on	Aerobic conditioning with back support — excellent starting point.
Walking (flat, short)	Phase 2+	Low-intensity upright activity. Start with 10 minutes, increase gradually.
Yoga / Pilates	Adapted	Floor-based poses are fine. Avoid prolonged standing poses early on.
Prolonged standing	Avoid early	Worsens blood pooling. Use counter-manoeuvres if unavoidable.
Hot yoga / saunas	Avoid	Heat causes vasodilation and worsens orthostatic intolerance significantly.
High-intensity upright cardio	Phase 3 only	Can trigger severe symptoms early in the programme. Introduce gradually.

Key principle: Consistency matters more than intensity. Shorter, regular sessions outperform occasional intense ones. Even on bad days, gentle activity (stretching, short slow walk) maintains conditioning better than complete rest. But if you have PEM, stop and rest.

Salt & fluid management

Expanding your blood volume — the foundation of PoTS management

Many people with PoTS have a reduced circulating blood volume. When you stand up, blood pools in the legs and abdomen — and if there isn't enough blood to begin with, the brain receives even less. Increasing fluid and salt intake helps correct this.[2]

This is not about drinking slightly more water. The targets are specific, and salt loading is an active part of treatment — not just a suggestion.

These measures alone may significantly reduce symptoms and should be tried for at least 4–6 weeks before adding medication.

Daily targets

2–3 L fluid per day

8–10 g salt (sodium chloride) per day

500 mL bolus water before standing (acute)

4–6 wks to assess effect

2–3 litres

Daily fluid intake

This should be spread throughout the day, not consumed in large volumes at once. Start your day with a large glass of water before getting up.

8–10 g NaCl

Daily salt intake

That's about 2 teaspoons of table salt per day. Includes salt in food and any supplements. Not appropriate if you have hypertension or kidney disease — check with your GP first.

Practical tips for fluid loading

Drink 500 mL of cold water rapidly before getting up in the morning — this triggers a reflex that reduces heart rate on standing for around 30 minutes.
Keep water accessible throughout the day. Set reminders if you forget to drink.
Electrolyte drinks (low-sugar) can help if plain water causes nausea, and improve absorption. Avoid high-sugar sports drinks which can worsen symptoms via their glycaemic effect.
Drink more in hot weather, after exercise, or if you have had diarrhoea or vomiting.
Limit caffeine and alcohol — both are diuretics and counteract fluid loading.
Dark-yellow urine is a sign of dehydration. Pale straw colour is the target.

Getting enough salt

Add salt to food generously — most people with PoTS can far exceed the usual healthy-eating salt recommendations (which do not apply to PoTS).
Salt tablets (available over the counter or on prescription) are a reliable way to hit the daily target — typically 1–2 g tablets with meals. Discuss dosing with your GP.
Foods naturally high in salt: olives, cheese, salted nuts, crisps, soup, pickles, soy sauce.
Consider a sports electrolyte capsule if your salt intake is limited by palatability.

Important: High salt intake is not appropriate for everyone. Do not follow this advice if you have hypertension, heart failure, kidney disease, or are pregnant without first discussing it with your doctor. Salt loading in these groups requires specialist supervision.

Diet and meals

Large carbohydrate-heavy meals cause significant blood pooling in the gut (postprandial hypotension) and can severely worsen PoTS symptoms. The following strategies can help:

Eat smaller, more frequent meals — 5–6 small meals rather than 3 large ones.
Reduce simple carbohydrates (white bread, white rice, sugary foods) and opt for complex carbs that cause a slower blood sugar response.
Increase protein and healthy fats — these have less effect on postprandial blood pooling.
Lie down or sit quietly after eating if symptoms are severe post-meals.
Avoid alcohol — it dilates blood vessels and worsens orthostatic symptoms.

Medications

Understanding medications used in PoTS

No drug is specifically licensed for PoTS in the UK. Medications are used when non-pharmacological management alone is insufficient. They should be started only after a proper diagnosis and discussion with your doctor.[3]

This page explains what each drug does, why it is used, and what to expect — in plain language for patients. Medication decisions should always be made with your clinical team.

Important

All medications listed on this page are used "off-label" for PoTS — meaning they are licensed for other conditions. This is common and legal in UK medicine, but means your doctor should explain this and document the decision.

Do not start or stop any medication without discussing it with your GP or specialist. This page is for information only and to help you have better conversations with your clinical team.

Ivabradine

First line

Typical dose

2.5–7.5 mg twice daily

How it helps

Slows heart rate selectively

Main side effects

Visual flickers (phosphenes), headache

Ivabradine works by slowing the heart's natural pacemaker without lowering blood pressure — an important advantage over beta-blockers in PoTS where blood pressure is often already low. It specifically blocks a channel called the I_f channel in the heart.

It is often considered first-line for PoTS in the UK because it reduces heart rate on standing without worsening fatigue or blood pressure, which can occur with propranolol. Clinical trials in PoTS, including a head-to-head comparison with propranolol, have shown good symptomatic improvement.[3]

The visual "flickering" side effect (seeing halos or light flashes, especially in bright conditions) is unusual and usually harmless. It typically improves with time or dose reduction. Ivabradine should not be used if you have atrial fibrillation.

Propranolol (low dose)

First line

Typical dose

10–20 mg two or three times daily

How it helps

Reduces heart rate and adrenaline effect

Main side effects

Fatigue, cold hands/feet, low blood pressure

Propranolol is a beta-blocker — it reduces the effect of adrenaline on the heart, slowing it down and reducing palpitations. At low doses (10–20 mg), it has been shown in clinical trials to reduce standing heart rate and palpitation symptoms in PoTS.[3]

The dose matters: Higher doses often cause more side effects (tiredness, low blood pressure, exercise intolerance) without additional benefit. If propranolol has been tried before at high doses and felt intolerable, low doses may still be worth considering.

Avoid in asthma. May worsen fatigue, which is already a significant problem in PoTS. Particularly useful in the hyperadrenergic subtype where adrenaline levels are elevated.

Fludrocortisone

Second line

Typical dose

50–200 micrograms daily

How it helps

Retains salt and water, expands blood volume

Monitor

Blood pressure, potassium, swelling

Fludrocortisone is a synthetic steroid hormone that acts on the kidneys to retain salt and water, expanding your blood volume. This can help reduce the pooling that occurs on standing. It is particularly useful in the hypovolaemic subtype of PoTS.

It is not suitable if you have high blood pressure, as it may raise it further. It also lowers potassium over time, so your GP will need to check blood tests periodically. Not recommended in the hyperadrenergic subtype.

Ankle swelling is a common side effect — compression stockings can help manage this alongside fludrocortisone.

Midodrine

Second line

Typical dose

2.5–10 mg three times daily

How it helps

Tightens blood vessels, reduces pooling

Important timing

Do not take within 4 hours of lying down

Midodrine is an alpha-1 agonist — it tightens the blood vessels in the body, preventing blood from pooling in the legs and abdomen when you stand. This raises blood pressure and reduces the heart rate rise that occurs on standing.

Critical timing rule: Never take midodrine within 4 hours of going to bed or lying down for a long period. This is because it will raise blood pressure when lying flat (supine hypertension), which can be dangerous. Take doses with meals at breakfast, lunch, and late afternoon only.

Common side effects include a tingling or prickling sensation of the scalp and skin (piloerection), urinary retention in some people, and goosebumps. These are related to its effect on the nervous system and are not dangerous.

Pyridostigmine

Specialist

Typical dose

30–60 mg two or three times daily

How it helps

Enhances nerve signalling to heart and vessels

Main side effects

Stomach cramps, diarrhoea, increased sweating

Pyridostigmine is typically used for myasthenia gravis, but has been studied in PoTS as well. It works by increasing the effect of a neurotransmitter called acetylcholine, which helps tone blood vessels and reduce the heart rate on standing.

It is generally well tolerated but GI side effects (nausea, diarrhoea, stomach cramps) can be limiting. Small clinical studies have shown reduction in standing heart rate. Usually considered when other agents have been tried and not fully effective.

Not responding to medication? If first-line treatments have not helped, ask your GP for a referral to a cardiologist or autonomic specialist for more detailed assessment and consideration of other options including combination therapy or IV saline infusions.

Day-to-day management

Practical strategies for daily life with PoTS

Medication and exercise matter — but what you do moment-to-moment makes a significant difference. These evidence-informed strategies can reduce the impact of PoTS on your daily activities.

Many of these tips work by reducing the amount of blood that pools in your legs and abdomen when you stand, or by slowing the rate at which you move from lying to standing.

Quick wins

Compression stockings 20–30 mmHg waist-high

Slow posture changes sit then pause, then stand

Morning water bolus 500 mL before getting up

Head-of-bed elevation 10–15 cm raised

Helpful habits

Wear waist-high compression stockings (20–30 mmHg) every day — put them on before getting out of bed
Raise the head of your bed by 10–15 cm using blocks or a wedge — this reduces overnight fluid shift to the legs
Change posture slowly — sit at the edge of the bed for 1–2 minutes before standing
Shower sitting down or use a shower stool — hot upright showers are one of the most common triggers
Use a shopping trolley or rollator for support when standing in queues
Cross your legs or clench your thigh and buttock muscles when standing — this pumps blood back to the heart
Squat, crouch, or sit on the floor if you feel faint — don't fight it standing up
Keep your environment cool — fans, cool drinks, and cool clothing all help
Eat small, frequent meals and avoid large carbohydrate loads
Pace activity — plan rest periods, alternate activity and rest throughout the day

Triggers to avoid or manage

Prolonged standing, especially in warm or crowded environments (supermarkets, queues)
Hot baths, showers, or saunas — heat causes vasodilation and rapid worsening
Large meals, especially high in simple carbohydrates
Alcohol — even small amounts can worsen symptoms significantly
Caffeine — can increase heart rate; some patients tolerate it better than others
Dehydration — even mild dehydration significantly worsens PoTS
Sudden changes from lying to standing — always transition gradually
Menstruation — symptoms often worsen; plan for extra support during this time
Infections and illness — can cause significant flares; prioritise rest and fluids
Skipping meals or going too long without eating

Counter-manoeuvres — what to do when you feel faint

When symptoms come on suddenly — typically when standing in a warm place or after a change in posture — these physical manoeuvres can help abort symptoms by rapidly increasing venous return to the heart:

🦵

Leg crossing

Cross legs and squeeze thighs together. Works within 30–60 seconds.

🙇

Squatting

Squat or kneel if you feel faint. Safest option when alone.

💪

Muscle tensing

Tense your thigh, calf, and abdominal muscles simultaneously.

🤸

Bending forward

Bend forward at the waist, hands on knees — reduces venous pooling.

Pacing and energy management: PoTS often coexists with significant fatigue. Boom-and-bust cycles — where you do too much on good days and crash — are common and counterproductive. Consider keeping an activity diary and aiming for consistent, moderate activity levels rather than variable extremes. An occupational therapist can help with energy management strategies.