Two Autonomic Disorders Compounding Each Other POTS is an autonomic nervous system disorder. Concussion produces autonomic nervous system dysfunction. When they overlap, the autonomic impairment is greater than either condition alone. The brainstem autonomic centers that regulate heart rate, blood pressure, and blood distribution on position change are already strained by POTS. Concussion damages these same centers through the acceleration-deceleration forces that concentrate at the brainstem. The system that was barely managing POTS now has additional injury (Raj, 2013). The cerebral blood flow problem doubles. POTS reduces cerebral blood flow on standing because blood pools in the lower extremities and the autonomic system cannot compensate adequately. Concussion independently impairs cerebral blood flow through damaged cerebrovascular reactivity. On standing, a POTS-concussion patient loses blood flow from both the pooling mechanism (POTS) and the reactivity mechanism (concussion). The resulting cerebral hypoperfusion is severe, producing the profound brain fog, cognitive shutdown, and presyncope that makes upright activity extremely difficult. Patients report that their POTS, which was previously manageable, becomes debilitating after concussion. Activities they tolerated (standing in line, shopping, cooking) become symptom-provoking. The heart rate response on standing (which POTS patients monitor) increases by 10-20 BPM beyond their pre-concussion baseline. The window of tolerable activity narrows dramatically. How Concussion Worsens Each POTS Mechanism Baroreflex sensitivity decreases. The baroreceptors in the carotid sinus and aortic arch detect blood pressure changes and trigger compensatory responses. POTS patients already have reduced baroreflex sensitivity. Concussion further impairs the neural pathways from baroreceptors to the brainstem autonomic centers. The result: slower and weaker blood pressure correction on standing, producing more severe orthostatic symptoms (Raj, 2013). Sympathetic activation increases. POTS often involves excessive sympathetic output (hyperadrenergic POTS) or inappropriate sympathetic responses. Concussion produces sympathetic hyperarousal through autonomic dysregulation. The combined sympathetic overdrive produces excessive heart rate responses, adrenaline surges, anxiety, tremor, and the "wired but tired" state where the body is physiologically activated but cognitively exhausted. Cerebral autoregulation fails. Healthy brains maintain constant cerebral blood flow across a wide range of blood pressures through autoregulation. Both POTS and concussion independently impair autoregulation. Together, cerebral blood flow becomes directly dependent on systemic blood pressure: when blood pressure drops on standing, cerebral blood flow drops proportionally. There is no buffer. Every position change produces a direct hit to brain perfusion. Neuroinflammation targets shared structures. Post-concussion neuroinflammation affects the brainstem regions that regulate autonomic function. In POTS patients, these regions are already vulnerable. The inflammatory insult to an already-stressed system produces more severe and longer-lasting autonomic dysfunction than in patients without pre-existing POTS (Benarroch, 2012). Modified Upright Tolerance Training POTS management involves gradually increasing upright tolerance. After concussion, this training must be modified to account for the compounded autonomic impairment. JME 1 Slow cervical rotation with extended exhale breathing performed in a seated or reclined position. This is the foundational exercise for POTS-concussion management. The extended exhale activates the vagal brake, which helps modulate the excessive heart rate response. The cervical rotation reduces sympathetic chain compression, addressing the mechanical component of autonomic dysfunction. Perform 10 repetitions seated before any standing activity. The parasympathetic activation creates an autonomic buffer that makes the subsequent position change less destabilizing. JME 14 Chin tucks in a seated or reclined position. The deep cervical flexor activation provides proprioceptive grounding that helps the brain accurately process position change information. POTS-concussion patients often experience a "disconnect" between their actual position and their brain's interpretation of it. Accurate cervical proprioception reduces this disconnect and the anxiety it produces. 10 repetitions before standing. JME 3 Lateral cervical flexion performed seated. The scalene release reduces sympathetic chain compression at C3-C7. For POTS patients, this directly addresses the cervical sympathetic contribution to excessive heart rate response. The sympathetic ganglia run alongside the cervical vertebrae. Reducing their mechanical compression provides measurable improvement in heart rate variability. 5 repetitions per side with extended exhale breathing. JME 153 Thoracic extension with diaphragmatic breathing performed seated or on an incline. The deep breathing expands blood volume return to the heart through the thoracic pump mechanism, directly addressing the venous pooling that drives POTS symptoms. Better venous return means less compensatory tachycardia on standing. The vagal stimulation from deep breathing further modulates the heart rate response. 10-15 breaths before transitioning to upright activities. Start your 14-day free trial for POTS-adapted concussion recovery routines. Reclined and Seated Exercise Options Traditional concussion rehabilitation assumes upright tolerance. POTS-concussion patients need reclined and seated alternatives. JME 150 Thoracic rotation performed seated maintains spinal mobility without the orthostatic challenge of standing. The rotation provides vestibular input that supports concussion recovery while the seated position prevents the blood pooling that provokes POTS symptoms. 5 rotations per side. This exercise bridges the gap between recumbent rest and upright activity. JME 42 Shoulder mobility performed seated or standing with support. Shoulder elevation and tension are common in POTS patients (from chronic sympathetic activation) and concussion patients (from cervical guarding). The combined tension restricts thoracic mobility and breathing efficiency. Seated shoulder mobility addresses both without the orthostatic challenge. JME 5 Cervical extension performed carefully and slowly. In POTS-concussion patients, cervical extension can briefly alter vertebral artery flow, which is already compromised. Perform slowly, hold briefly (3-5 seconds), and return to neutral. If extension produces dizziness or visual changes, reduce the range. The suboccipital release benefits are significant but require gentle application in this population. JME 6 Cervical flexion is generally better tolerated than extension in POTS patients. The flexion position does not challenge vertebral artery flow. Gentle flexion with extended exhale breathing provides cervical relief and parasympathetic activation. Perform before sleep to address both the cervical tension and autonomic dysregulation that disrupt sleep in POTS-concussion patients. Exercise safely with POTS and concussion with simplmobility's adapted programming. Critical Management Strategies Increase fluid and salt intake beyond standard POTS recommendations. Concussion-related autonomic dysfunction increases the blood volume requirements. If you were managing POTS with 2-3 liters of fluid and 3-5 grams of salt daily, increase by 20-30% during concussion recovery. The additional volume improves cerebral perfusion that both conditions compromise. Electrolyte drinks are more effective than water alone. Compression garments become more important. Waist-high compression stockings (30-40 mmHg) that were optional before concussion become essential after. The compression reduces venous pooling that both conditions worsen. Abdominal binders add additional venous return support. The improved venous return translates directly to better cerebral perfusion and reduced symptom burden. Avoid heat aggressively. Heat vasodilates peripheral blood vessels, worsening venous pooling. POTS patients are heat-sensitive at baseline. Adding concussion-related thermoregulatory dysfunction makes heat a potent symptom trigger. Avoid hot showers (use lukewarm), hot environments, and prolonged sun exposure. Keep indoor temperature at 68-70°F during recovery. Rise in stages. Reclined to seated: pause 30-60 seconds. Seated to standing: pause 30-60 seconds. Standing to walking: pause 10-20 seconds. Each pause allows the autonomic system time to adjust, reducing the orthostatic challenge. The POTS-concussion autonomic system is slower to respond than POTS alone. Longer transition pauses prevent the presyncope and symptom spikes that rapid position changes produce. Will my POTS return to its pre-concussion baseline? For most mild concussions, POTS returns to its pre-concussion severity within 2-4 months as autonomic function normalizes. The concussion-related worsening is temporary and resolves with the autonomic healing process. During recovery, managing POTS aggressively (fluids, salt, compression, medication optimization) prevents the deconditioning that worsens both conditions. If POTS remains significantly worse than baseline after 6 months, reassessment for additional autonomic injury is warranted. Should I adjust my POTS medications after concussion? Discuss medication adjustments with your POTS specialist. Midodrine (vasopressor) dosing may need to increase to compensate for the additional autonomic impairment. Beta-blockers require careful adjustment: they address tachycardia but can worsen the fatigue and brain fog of concussion. Fludrocortisone for volume expansion becomes more important. Ivabradine, which reduces heart rate without blood pressure effects, is well-tolerated during concussion recovery and may be preferable to beta-blockers during the acute phase. Is exercise safe with both POTS and concussion? Reclined exercise (recumbent bike, swimming, rowing) is the safest starting point. These modalities provide cardiovascular training without the orthostatic challenge that triggers POTS symptoms. Graduated upright exercise follows as both conditions improve. The concussion exercise threshold (heart rate at symptom onset) and the POTS heart rate limit (standing HR under 120-130 BPM) both constrain exercise intensity. Train below whichever limit is lower. References Raj, S. R. (2013). Postural tachycardia syndrome (POTS). Circulation, 127(23), 2336-2342. PubMed Benarroch, E. E. (2012). Postural tachycardia syndrome: A heterogeneous and multifactorial disorder. Mayo Clinic Proceedings, 87(12), 1214-1225. PubMed