Surfer’s Myelopathy: A Rare Non-Traumatic Spinal Injury

Surfer’s myelopathy is a spinal cord injury caused not by trauma but by reduced blood flow to the thoracic or lower spinal cord, triggered by the prolonged prone position and back arching involved in learning to surf. A systematic review found only 64 reported cases worldwide, with a neurological recovery rate of just 42%, almost all occurring in young, otherwise healthy people trying surfing for the first or second time.¹ The condition is genuinely rare, but its consequences can be devastating, and its quirky specificity to beginners makes it worth understanding for anyone heading into the water for the first time.

Why Beginners and Not Experienced Surfers

The single most striking feature of surfer’s myelopathy is its near-exclusive targeting of novice surfers. Experienced surfers almost never develop it. The reason comes down to body mechanics and conditioning. When you lie prone on a surfboard and paddle, your back naturally arches into extension. An experienced surfer has built up core strength and postural habits that limit how far their spine hyperextends, and they spend less time in that position because their pop-up technique is efficient. A beginner, by contrast, tends to lie flat on the board for extended stretches, arching the lower back dramatically while paddling with the arms and trying to look forward. That sustained hyperextension is the setup for trouble.

The critical blood vessel at risk is the artery of Adamkiewicz, the major supplier of the lower two-thirds of the spinal cord. Research has identified that hyperextension in the back leads to insufficient blood flow through this artery by dynamically compressing it. When a novice surfer then attempts to stand up on the board, they often perform a Valsalva maneuver, bearing down hard with the abdominal muscles while holding their breath, which further increases pressure inside the spinal canal.² The combination of compressed artery and spiking intraspinal pressure starves the spinal cord of oxygen, producing an ischemic injury similar in mechanism to a stroke but located in the spine rather than the brain.

This explains the paradox: the people most at risk are the ones who look least likely to sustain a serious injury. They are young, fit, and have no pre-existing spinal disease. They simply lack the specific conditioning and technique that would protect their spinal blood supply during that particular activity.

What the Symptoms Look Like

The clinical pattern of surfer’s myelopathy is remarkably consistent across reported cases. The first sign is sudden-onset low back pain while surfing or shortly after leaving the water. Within minutes, numbness spreads into both legs, followed by progressive weakness that can escalate to full paralysis. In a case series of 19 novice surfers, all patients reported this same sequence: sudden back pain, then bilateral leg numbness and paralysis progressing over a window of roughly 10 to 60 minutes.³ Another case series described three novice surfers who all showed rapid progression from back pain to paraplegia.⁴

The speed of progression is alarming. A person can walk into the ocean feeling perfectly fine and be unable to move their legs within an hour. Because there is no fall, collision, or obvious injury, it can be hard for bystanders or even the surfer themselves to understand what is happening. The back pain might initially be dismissed as a muscle strain, and by the time the numbness and weakness set in, the window for recognizing the emergency has narrowed considerably.

Bowel and bladder dysfunction often accompany the leg paralysis, reflecting the involvement of the lower spinal cord and conus medullaris (the tapering end of the spinal cord). Sensation below the affected level may be partially or fully lost. The severity varies from person to person, but the trajectory of symptoms is fast enough that anyone experiencing sudden back pain followed by leg weakness during or after surfing should be treated as a medical emergency.

Why It Is Easily Misdiagnosed

One of the biggest challenges with surfer’s myelopathy is that it does not immediately look like what it is. Because there is no traumatic event, the possibility of a spinal cord injury may not cross a clinician’s mind right away. The condition can resemble other causes of acute myelopathy, and its clinical and radiological presentations overlap with other diagnoses, further complicating identification.² Conditions like transverse myelitis, Guillain-Barré syndrome, or even a herniated disc with cord compression can look similar in the early hours.

MRI is the key diagnostic tool. Spinal MRI typically shows changes consistent with spinal cord ischemia on T2-weighted and diffusion-weighted imaging.⁵ The affected area usually involves the thoracic cord and conus medullaris, matching the territory supplied by the artery of Adamkiewicz. But MRI findings can be subtle in the first several hours, and the imaging pattern is not unique to surfer’s myelopathy. It takes a clinician who knows the condition exists and can connect the dots between a surfing history, acute back pain, rapidly progressive paraplegia, and the MRI pattern.

This is where awareness becomes critical. An emergency physician in a coastal area who has seen a case before will think of surfer’s myelopathy immediately. One who hasn’t may spend valuable time ruling out other diagnoses. The condition is rare enough that most doctors will never encounter a case in their careers, which makes public awareness among surf instructors, lifeguards, and surfers themselves all the more important.

Treatment Options Are Limited

There is no established standard of care for surfer’s myelopathy, and that uncertainty reflects both its rarity and the limited research base. Treatment protocols across published cases have varied greatly, and outcomes appear to depend heavily on the severity of the initial injury and possibly on whatever treatment was attempted first.⁶

Approaches that have been tried in various case reports include high-dose corticosteroids to reduce spinal cord swelling, induced hypertension to push more blood through the compromised vasculature, and general supportive care including blood thinners. None of these has been validated in a controlled trial, and given that only a few dozen cases exist in the medical literature, a proper randomized trial is unlikely to happen anytime soon. Clinicians are essentially borrowing treatment strategies from other forms of spinal cord ischemia and hoping the principles transfer.

What is clear from the published cases is that early recognition matters. A spinal cord that has been ischemic for a short period has a better chance of recovering than one that has been oxygen-starved for hours. This makes the diagnostic challenge described above doubly consequential: delays in recognizing the condition translate directly into delays in whatever treatment a physician decides to try.

Recovery and Long-Term Outcomes

The prognosis for surfer’s myelopathy is sobering. The systematic review of all reported cases found a neurological recovery rate of only 42%.¹ That means more than half of patients were left with lasting neurological deficits, ranging from residual weakness and numbness to permanent paraplegia. For a condition that strikes young, healthy people during a recreational activity, those odds are grim.

The severity of the initial presentation seems to be the strongest predictor of how well someone recovers. Patients who present with complete paralysis tend to fare worse than those who retain some motor function in their legs from the start. This makes intuitive sense: complete loss of function suggests more extensive spinal cord damage, while partial weakness suggests the ischemic injury was less severe or affected a smaller region of cord tissue.

For patients with severe, lasting deficits, rehabilitation becomes the primary path forward. A case study of one such patient documented the rehabilitation process: the individual progressed to independence at the wheelchair level, learned to manage transfers, and was taught bowel and bladder management strategies along with pressure relief techniques for daily life.⁷ This is the reality for a meaningful proportion of surfer’s myelopathy patients: a young person who walked into the ocean leaves the hospital in a wheelchair, and their rehabilitation goals shift from recovery of function to adaptation and independence within their new limitations.

Can It Happen Without Surfing

Although the name ties the condition to surfing, the underlying mechanism is not unique to riding waves. Any activity that involves prolonged spinal hyperextension with a component of Valsalva-type straining could, in theory, produce the same vascular compromise. Pediatric cases have been reported in children who were not surfing at all, with spinal MRI showing the same ischemic changes.⁵

Activities that have been anecdotally associated with similar presentations include bodyboarding, prolonged yoga backbends, and other scenarios where the thoracolumbar spine is held in deep extension for sustained periods. The common thread is not the specific sport but the combination of hyperextension and vascular anatomy. The artery of Adamkiewicz is vulnerable because of where it enters the spinal canal, and any posture that compresses it long enough can, in susceptible individuals, produce ischemia.

This broadens the relevance of the condition beyond the surfing community. While “surfer’s myelopathy” remains the established name because the vast majority of cases have been reported in surfers, clinicians encountering unexplained acute myelopathy in a young person should consider spinal cord ischemia from hyperextension even if the patient has never touched a surfboard.

Prevention Through Awareness and Equipment

Because surfer’s myelopathy is so rare and its onset so sudden, prevention has to rely mostly on awareness. A comprehensive review concluded that increased awareness of the condition is arguably the most effective preventive measure, as it may lead to avoidance of the predisposing postures.⁸ In practical terms, that means surf schools and instructors should know the condition exists, teach beginners to limit the degree and duration of back arching while paddling, and take any complaint of sudden back pain seriously rather than brushing it off as a muscle cramp.

Some practical steps for beginners include:

Limit paddling time: Take breaks from the prone position rather than lying on the board for prolonged stretches.
Watch your arch: Conscious effort to avoid maximal lumbar hyperextension while paddling can reduce compression on spinal blood vessels.
Build core strength first: Some baseline conditioning before a first surf session may help stabilize the spine and reduce the degree of passive hyperextension.
Know the warning signs: Sudden back pain during surfing is not normal muscle soreness. If it comes on sharply and is followed by tingling or weakness in the legs, get out of the water and seek medical attention immediately.

On the equipment side, researchers have explored whether wearable devices might help. A study tested an inflatable vest worn while paddling and found that it significantly reduced trunk extension by about 18% compared to wearing no vest. Activation of the erector spinae and mid-trapezius muscles also dropped significantly, by roughly 12% and 18% respectively, suggesting the vest offloaded some of the postural demand that leads to hyperextension.⁹ The effect was even more pronounced on longboards, which require more sustained paddling effort. While this research has not yet been linked directly to surfer’s myelopathy prevention in a clinical study, the biomechanical logic is straightforward: anything that reduces the degree of spinal hyperextension during paddling should reduce the risk of compressing the artery of Adamkiewicz.

What Surf Schools and Lifeguards Should Know

The people best positioned to prevent surfer’s myelopathy or catch it early are not hospital physicians. They are surf instructors and beach lifeguards who are present when the condition develops. Yet because the condition is so rare, many in these roles have never heard of it. A few key pieces of knowledge could make a meaningful difference.

First, the typical patient profile: a young, healthy beginner who has been paddling for a while and begins to complain of sudden, sharp back pain. This is not the gradual ache of muscle fatigue. It comes on abruptly. If that person then develops tingling, numbness, or weakness in the legs within the next few minutes to an hour, the response should be to get them out of the water, keep them still, and call emergency medical services. Attempting to “walk it off” wastes time.

Second, the timeline matters. The condition progresses from first symptom to maximal deficit over minutes to an hour. The faster the person gets to a hospital where MRI is available and clinicians can consider spinal cord ischemia, the better the chance of whatever treatment exists making a difference. A beginner surfer who goes limp in the legs in the water also becomes a drowning risk, so the safety stakes are doubled.

Third, the condition does not require a wipeout, collision, or any kind of impact. One of the most common initial reactions from both patients and bystanders is confusion about how someone could have a spinal cord injury without any trauma. Knowing that the injury is vascular, not mechanical, clears that confusion and speeds the path to appropriate care.

An Underreported Condition

The 64 cases captured in the systematic review almost certainly undercount the true incidence of surfer’s myelopathy.¹ Mild or self-limiting cases, where someone experienced transient weakness or numbness that resolved before they ever saw a doctor, would never make it into the medical literature. Cases misdiagnosed as transverse myelitis or another condition also escape the surfer’s myelopathy tally. And in parts of the world where surfing is popular but access to MRI and specialty neurology is limited, cases may go unrecognized entirely.

The growth of surfing as a global sport and its inclusion in the Olympics have brought more first-time participants to the water than ever before. Surf tourism in destinations like Bali, Sri Lanka, Portugal, and Central America puts large numbers of novice surfers on boards every day, often with minimal instruction. Whether this will translate into more recognized cases depends on whether awareness of the condition keeps pace with the sport’s expansion. The medical literature on surfer’s myelopathy has grown steadily since the condition was first described in 2004, and case reports continue to trickle in from new geographies. But for a condition where awareness is the primary preventive tool, there is still a long gap between what neurologists and spinal cord specialists know and what the people most at risk, beginner surfers and their instructors, have been told.

1
PubMed. Surfer’s Myelopathy: A Rare Form of Spinal Cord Infarction in Novice Surfers: A Systematic Review
2
PubMed Central. Surfer’s myelopathy: A review of etiology, pathogenesis, evaluation, and management
3
PubMed. Surfers’ myelopathy: a case series of 19 novice surfers with nontraumatic myelopathy
4
PubMed Central. Surfer’s Myelopathy : Case Series and Literature Review
5
Spinal Cord Series and Cases. Surfer’s myelopathy without surfing: a report of two pediatric patients
6
PM R. Surfer’s Myelopathy Treated with Steroids and Induced Hypertension: A Case Report
7
PM&R. Rehabilitation in Acute Surfer’s Myelopathy: A Case Study
8
PubMed Central. Atraumatic Spinal Cord Injury in the Novice Surfer: A Comprehensive Review and Update
9
PubMed. Wearing an Inflatable Vest Alters Muscle Activation and Trunk Angle While Paddling a Surfboard