Dysautonomia and Exercise Rehabilitation: What the Evidence Says
While this blog focuses specifically on Postural Orthostatic Tachycardia Syndrome (POTS), the fundamental principles of exercise rehabilitation outlined here are broadly applicable to other forms of dysautonomia, including orthostatic intolerance and Inappropriate Sinus Tachycardia (IST). If you have been diagnosed with one of these related conditions, much of the guidance below will still be relevant to your rehabilitation journey — though individualised assessment and programme design remain essential.
Understanding POTS
Postural Orthostatic Tachycardia Syndrome (POTS) is a complex condition that affects the autonomic nervous system which is the part of the nervous system responsible for controlling automatic bodily functions like heart rate, blood pressure, and circulation. It belongs to a broader group of conditions known dysautonomia.
When a person with POTS stands up, blood pools in the legs and abdomen rather than returning efficiently to the heart. To compensate, the heart rate rises rapidly and often excessively to attempt to maintain adequate blood flow to the brain and vital organs. This produces a range of debilitating symptoms including dizziness, lightheadedness, palpitations, fatigue, brain fog, and in some cases near-fainting or fainting. A key hallmark of POTS is that these symptoms typically improve when the person lies back down, because this removes the gravitational challenge that triggers them.
Why Exercise Feels So Difficult with POTS
If you have POTS and struggle to exercise, it is important to know that this is not simply a matter of being unfit or lacking motivation. There is a clear, measurable physiological basis for exercise intolerance in POTS and understanding it can help validate your experience and guide your rehabilitation journey.
Large observational studies and patient registry data consistently show that 80–90% of people with POTS have significantly reduced exercise capacity, with exercise intolerance ranking among the most commonly reported symptoms alongside fatigue, rapid heart rate, and dizziness.
The reasons why exercise is so challenging in POTS are multifactorial, meaning several different physiological problems are often occurring at the same time:
· Reduced heart size and muscle mass, which limits the heart's ability to pump an adequate volume of blood during physical activity
· Blood pooling in the legs and abdomen when upright, reducing the amount of blood returning to the heart and therefore the amount the heart can pump out with each beat
· An exaggerated heart rate response — the heart rate often increases up to near-maximal levels even during gentle or moderate activity, leaving little cardiovascular reserve to sustain exercise
· Lower blood volume overall, which further reduces the heart's ability to respond to the demands of exercise
· Inefficient breathing patterns, including a reduced breathing efficiency and a tendency to hyperventilate, which can worsen breathlessness and fatigue during exertion
· Peripheral muscle limitations, including muscles tiring more quickly than expected due to reduced oxygen delivery and impaired energy production at the cellular level
· Poor blood flow redistribution during exercise — in a healthy person, blood is efficiently redirected toward working muscles during exercise; in POTS, this mechanism is impaired, meaning muscles do not receive the oxygen and fuel they need. Furthermore, the capacity of blood vessels to constrict and dilate correctly is also impaired.
Measuring Exercise Intolerance: The Role of CPET
A Cardiopulmonary Exercise Test (CPET) is considered the gold standard for objectively measuring exercise tolerance and pinpointing the specific causes of exercise limitation. It allows us to identify how your heart lungs and muscles are working during exercise.
One of the key measurements obtained from a CPET is VO₂peak which is the maximum rate at which your body can take in, transport, and use oxygen during exercise. In people with POTS, VO₂peak is commonly reduced, and it correlates closely with how functionally impaired and symptomatic a person is in daily life.
What a CPET Can Do for You
· Validate your symptoms objectively: A CPET can identify measurable physiological abnormalities that explain your fatigue, breathlessness, and dizziness
· Identify exactly why exercise is difficult for you: Differentiating whether the primary problem is cardiovascular, respiratory, or related to muscle function, which has direct implications for how your programme should be structured
· Enable a personalised, safe exercise prescription: Including precise heart rate training zones and intensity thresholds that allow you to exercise effectively without triggering symptom flares
· Track your progress over time: providing objective data on how your physiology is responding to rehabilitation, which can be incredibly motivating and clinically informative
When CPET Isn't Accessible: The Utah ADaPT Protocol
Access to CPET is not available to everyone, particularly outside of specialist centers. For patients who are unable to access CPET, the Utah Autonomic Disorder adaptive Physical Therapy (ADaPT) programme provides a clinically validated and flexible alternative for structuring exercise rehabilitation in POTS and related autonomic conditions.
Developed at the University of Utah, the ADaPT protocol was specifically created to address the limitations of earlier, more rigid exercise protocols such as the Dallas and CHOP protocols which were not well suited to patients with additional conditions like hypermobile Ehlers-Danlos syndrome (hEDS), Mast Cell Activation Syndrome (MCAS), or Post-Exertional Malaise (PEM), and which had relatively high dropout rates as a result.
Key Features of the Utah ADaPT Protocol
· Progress is guided by how your body responds - rather than following a fixed, time-based schedule, you advance through stages based on your individual symptomatic and physiological response. This means the programme can flex around your good days and bad days without forcing premature progression
· Regular check-ins at each stage allow your clinician to adjust the programme based on objective and subjective feedback, ensuring you are always working within a safe and productive range
· Both aerobic and resistance training are incorporated, with built-in pathways for modifying exercises if you have additional comorbidities
· Begins in lying or supported positions, gradually progressing toward more upright exercise as your tolerance for standing improves
· Focuses on helping you understand and manage your own condition : Teaching self-monitoring skills and pacing strategies that empower you to manage your energy and activity levels independently over the long term
· Designed to work across different settings: Including community gyms, physiotherapy clinics, and home environments- making it genuinely accessible for patients who cannot attend specialist centres
The ADaPT protocol is an important development in making structured, safe exercise rehabilitation available to a wider range of POTS patients- particularly those with complex presentations who may have previously found standard protocols unmanageable.
Does Exercise Rehabilitation Actually Work?
The short answer is: YES and the evidence is genuinely encouraging. Short-term (3-month) structured exercise programmes have produced clinically meaningful physiological improvements in people with POTS:
· 8–11% increase in VO₂peak, reflecting real improvement in cardiorespiratory fitness and exercise capacity
· 12% increase in cardiac mass and 8% increase in cardiac dimensions - meaning the heart itself becomes larger and stronger, improving its ability to pump blood effectively
· 6% increase in circulating blood volume, which directly supports better haemodynamic stability during upright activity and exercise
· Significant improvement in symptoms following exercise and better autonomic regulation.
· It is also worth noting that programme completion rates were 76% in supervised settings compared to only 41% in community (unsupervised) settings - a stark difference that underscores just how important having support and supervision is in making exercise rehabilitation achievable and sustainable. However, it also underscores the needs for individualized exercise programming as opposed to ridged set guidelines to ensure patient can adhere to the exercise programme.
A randomised controlled trial has further shown that semi-supervised exercise, a combination of in-person and virtual sessions produces better outcomes than fully unsupervised home programmes, making it a practical middle ground for many patients.
How to Structure an Exercise Programme for POTS
Aerobic (Cardiovascular) Training
The primary goal of aerobic training in POTS is cardiovascular reconditioning gradually rebuilding the heart's size and strength, increasing blood volume, and improving the autonomic nervous system's regulation of circulation.
· Start lying down or reclined: modalities such as rowing machines, recumbent exercise bikes, and swimming are the best starting points because they allow you to exercise effectively without the added challenge of being upright. This is not a step backwards it is the physiologically sound starting point for POTS
· Begin with just 1–2 sessions per week, with slow and carefully managed increases in volume and intensity based on how you respond
· There is no fixed timeline for progression : your programme should move at your pace, guided by symptoms, tolerance, and the presence or absence of Post-Exertional Malaise (PEM). If you feel worse after a session, that is important feedback, not failure
· Use both your heart rate and how hard the exercise feels (Rating of Perceived Exertion, or RPE) together to gauge intensity - in POTS, heart rate alone can be misleading due to the exaggerated heart rate response, so perceived effort is an equally important guide
Resistance Training
Resistance (strength) training plays an important supporting role in POTS rehabilitation by strengthening the muscles that actively assist venous return and postural stability.
· Focus on the lower body and core: These muscle groups act as a natural pump for returning blood to the heart, and improving their strength directly reduces the burden on your cardiovascular system during upright activity
· Begin in lying or seated positions, progressing to standing exercises as your tolerance develops
· Strength training can be done on the same day as aerobic training
· Avoid overhead exercises (e.g., shoulder press or overhead raises) having your arms raised above heart level increases venous pooling and is a common trigger for symptom flares in POTS
Practical Tips to Support Your Rehabilitation
Getting the most out of your exercise programme involves more than just the training itself. The following strategies are well-supported by evidence and clinical experience:
· Wear medical-grade compression garments covering the thighs and abdomen during exercise these help to prevent blood pooling in the lower body and reduce the haemodynamic challenge of upright activity
· Take electrolytes before and during exercise : consuming electrolytes approximately 30 minutes before your session and during exercise helps support blood volume and cardiovascular stability
· Time your sessions wisely: exercise when your symptoms are at their lowest. For many people with POTS, mornings are the most symptomatic time of day and are generally best avoided
· Adjust your programme around your menstrual cycle: hormonal changes around menstruation reduce plasma volume and worsen symptoms in many people with POTS. During these periods, aim for a heart rate approximately 10 bpm lower than usual, incorporate additional pacing strategies, and be kind to yourself about reducing intensity or volume
· Involve your support people: Educating family members and caregivers about your programme, what to expect, and how to support your pacing at home makes a meaningful difference to outcomes
· Build in rewards and milestones: Especially if you are working with younger patients or children, structured reward systems can help sustain motivation and engagement, particularly in the early stages when progress may feel slow
· Access supervised exercise wherever possible: The evidence is clear that supervised rehabilitation produces better results and significantly lower dropout rates than unsupervised programmes
Closing Thoughts
Exercise rehabilitation is one of the most effective non-pharmacological treatment/ management strategies available for POTS, with the potential to produce lasting physiological improvements and improvement in quality of life. However, its success depends on an approach that is carefully individualised, evidence-based, and respectful of the unique challenges this condition presents.
Whether you are working through a formal CPET-guided programme or following an adaptive framework like the Utah ADaPT protocol, the evidence is clear: structured, progressive, supervised exercise rehabilitation when approached at the right pace and with the right support offers a genuine and meaningful pathway toward improved function and quality of life with POTS.
If you are unsure where to start, speaking with a clinical exercise physiologist experienced, physiotherapist or allied health professional who specialized in autonomic conditions is a valuable first step.
Key References
Fu Q, Levine BD. Exercise and non-pharmacological treatment of POTS. Auton Neurosci. 2018;215:20–27.
Sheldon RS, et al. 2015 Heart Rhythm Society Expert Consensus Statement on the diagnosis and treatment of postural tachycardia syndrome, inappropriate sinus tachycardia, and vasovagal syncope. Heart Rhythm. 2015.
Wheatley-Guy CM, et al. Semi-supervised exercise training program more effective for individuals with POTS. Clin Auton Res. 2023;33(6):659–672.
Trimble KZ, et al. Adaptive Approaches to Exercise Rehabilitation for Postural Orthostatic Tachycardia Syndrome [Utah ADaPT Protocol]. Arch Rehabil Res Clin Transl. 2024.
Postural Orthostatic Tachycardia Syndrome: A State-of-the-Art Review. Heart, Lung and Circulation. 2025.
