The heel drop test is a bedside clinical maneuver used to detect inflammation inside the abdomen, most commonly during the evaluation of suspected appendicitis. The patient stands on tiptoes and drops sharply onto their heels, and a positive result is a sudden jolt of pain in the lower right abdomen. First described in the early 1970s and sometimes called the Markle test, it works by transmitting a vibration through the body that disturbs an inflamed peritoneum, the membrane lining the abdominal cavity. The same term, “heel drop,” also shows up in sports medicine, where it refers to a completely different thing: an eccentric calf exercise used to treat Achilles tendon problems. Both are worth understanding, but they share only a name.
How the Appendicitis Heel Drop Test Works
The test was originally published in 1973 by Gerald B. Markle and was designed as a simpler, less painful alternative to the rebound tenderness test, where a clinician presses deep into the abdomen and then quickly lifts their hand to see if the release triggers pain. The heel drop test skips the hands-on component altogether. The patient stands upright, rises onto the balls of their feet, and then lets their heels slam back down onto the floor. If the resulting jolt produces a sharp, localized pain, that is considered a positive sign of peritoneal irritation.
The underlying idea is straightforward: dropping onto your heels sends a shock wave up through your skeleton and into the abdominal cavity. If the peritoneum is inflamed, as happens in appendicitis, that transmitted vibration moves the irritated tissue just enough to provoke pain. The test was shown to be superior to the better-known rebound test when it was first introduced, and it has remained in clinical use since.1JAMA Surgery. Heel-Drop Jarring Test for Appendicitis One practical advantage is that the patient controls the force involved. With rebound testing, the clinician is the one pressing into a tender abdomen, which can cause significant distress and sometimes leads to guarding that makes the exam harder to interpret. With the heel drop, the patient simply stands and drops.
Accuracy Compared to Rebound Tenderness
A study evaluating the heel drop test alongside standard physical exam findings in adults with suspected appendicitis found that the heel drop outperformed rebound tenderness on both sensitivity and specificity. The heel drop test correctly identified about 69% of appendicitis cases (sensitivity) compared to 59% for rebound tenderness, and it correctly ruled out appendicitis in about 65% of non-appendicitis cases (specificity) compared to 63% for rebound tenderness. A positive heel drop test was present in roughly 69% of patients who turned out to have appendicitis, versus about 35% of patients who had other diagnoses.2PubMed Central. Clinical Importance of the Heel Drop Test and a New Clinical Score for Adult Appendicitis
Those numbers deserve some context. Neither test is anywhere close to perfect on its own, and no single physical exam maneuver is reliable enough to confirm or rule out appendicitis by itself. A sensitivity of 69% means the test misses about a third of actual appendicitis cases, and a specificity of 65% means it produces a fair number of false alarms. The value of the heel drop lies not in replacing imaging or lab work, but in adding another data point during the initial bedside evaluation. In the same study, the heel drop test carried the highest odds ratio among the clinical parameters examined when predicting appendicitis, with an odds ratio of about 3.4, meaning a positive result roughly tripled the odds of the patient actually having the condition.3PubMed Central. Clinical Importance of the Heel Drop Test and a New Clinical Score for Adult Appendicitis
When the Patient Cannot Stand Up
A common practical problem with the heel drop test is that some patients are too sick, too young, or in too much pain to stand and drop onto their heels. A modified version addresses this. The patient stays lying on their back while the examiner strikes the bottom of the patient’s heel with their hand. This sends a similar vibration up through the leg and into the abdominal cavity, disturbing the peritoneum in the same way the standing version does. A positive result is the same: the patient reports pain in the area of concern, typically the right lower quadrant.4PubMed Central. Clinical Importance of the Heel Drop Test and a New Clinical Score for Adult Appendicitis
This supine modification is especially useful in emergency departments, where patients often arrive on stretchers and may not be able to get up safely. It is also helpful for patients with muscular abdominal walls, where pressing to check for rebound tenderness can be unreliable because tense muscles mask the response. The vibration from the heel strike bypasses the abdominal wall entirely, reaching the peritoneum through the skeleton instead.
Not Just Appendicitis
Although the heel drop test is most closely associated with appendicitis, the principle behind it applies to any condition involving peritoneal irritation. Conditions like a perforated ulcer, diverticulitis, or a ruptured ovarian cyst can all inflame the peritoneum and potentially produce a positive heel drop. The test does not tell you what is inflamed; it tells you that something is. That makes it a general screening maneuver for intra-abdominal inflammation rather than a specific diagnostic for any one disease.
The test has also been noted as one of the most sensitive bedside maneuvers for detecting meningitis, the inflammation of membranes surrounding the brain and spinal cord. The mechanism is analogous: the jarring force travels up the spine and disturbs inflamed meninges, producing a headache or neck pain on impact.5PubMed Central. Clinical Importance of the Heel Drop Test and a New Clinical Score for Adult Appendicitis This dual utility makes the heel drop a surprisingly versatile clinical tool, though it is far more commonly taught and used in the context of abdominal pain.
The Heel Drop Test in Children
Diagnosing appendicitis in children is notoriously tricky. Kids often cannot articulate where it hurts, they may resist having their abdomen pressed on, and the symptoms overlap heavily with common conditions like gastroenteritis. The heel drop test offers an advantage here because it can be performed with minimal distress. A child can be asked to hop or jump rather than undergo a formal rebound exam, and the clinician simply watches for a pain response.
A recent study of 142 children incorporated the heel drop test into a new clinical scoring tool called the CHANSE score, designed to help clinicians quickly assess the likelihood of appendicitis at the bedside. Among the children in the study, 84 were ultimately diagnosed with appendicitis, and a positive heel drop test was significantly more common in those children compared to those without appendicitis. The diagnostic performance of the heel drop was comparable to other provocation tests like coughing, percussion, and hopping tenderness. The CHANSE score, which combines the heel drop with other clinical features, performed better than the widely used Pediatric Appendicitis Score. Higher CHANSE scores were also linked to complicated appendicitis, meaning cases that had already progressed to perforation or abscess formation.6PubMed Central. The CHANSE score: a novel clinical tool incorporating the heel drop test for the diagnosis of pediatric appendicitis
For parents, the practical takeaway is that if your child is complaining of stomach pain and a doctor asks them to hop on one foot or drop onto their heels, it is not a random request. The clinician is looking for a specific pain response that raises the likelihood of appendicitis.
Why the Test Remains Underused
Despite being around for over fifty years and outperforming rebound tenderness in direct comparisons, the heel drop test is not universally taught or used. Medical training tends to emphasize rebound tenderness, McBurney’s point tenderness, and other classic abdominal exam findings, and the Markle test sometimes gets only a passing mention. Part of the reason is inertia: rebound tenderness has been a textbook staple for much longer. Another part is that the test requires the patient to stand, which limits its use in settings where patients are typically lying down, even though the modified supine version addresses this.
There is also the broader reality that the physical exam for appendicitis has been somewhat eclipsed by imaging. CT scans and ultrasound are highly accurate for diagnosing appendicitis, and in many emergency departments, imaging is ordered almost reflexively when appendicitis is on the differential diagnosis. The heel drop test is most valuable in situations where imaging is not immediately available, where radiation exposure is a concern (as with children), or where clinicians need to quickly triage a patient before ordering studies. It is a low-tech tool, and in a high-tech environment, low-tech tools tend to get sidelined even when they still have genuine utility.
The Other Heel Drop: Eccentric Exercise for Achilles Tendinopathy
If you arrived here searching for “heel drop” in the context of a sore Achilles tendon, you are looking for something completely unrelated to appendicitis. The heel drop exercise is a specific rehabilitation protocol developed by the Swedish orthopedic surgeon HÃ¥kan Alfredson in the late 1990s. It targets chronic midportion Achilles tendinopathy, the persistent pain and thickening of the Achilles tendon that affects runners, recreational athletes, and sometimes people with no athletic history at all.
The exercise itself is simple. You stand on the edge of a step with your heels hanging off, rise up onto your toes using both legs, then slowly lower one heel below the level of the step using only the affected leg. The key is the “eccentric” phase, the controlled lowering. The original Alfredson protocol calls for three sets of 15 repetitions, twice a day, every day, for twelve weeks. The exercise is meant to be done through mild discomfort but stopped if pain becomes severe. Over time, resistance is added, typically by wearing a weighted backpack.
Long-Term Results of the Alfredson Protocol
The short-term evidence for eccentric heel drops has been reasonably strong, with most patients reporting meaningful improvement in pain and function within the first three months. A five-year follow-up study looked at what happened to patients long after they completed the initial program. Using a validated pain and function score called the VISA-A (where higher is better and 100 is a perfectly healthy tendon), patients started at an average score of about 49 and improved to about 84 at the five-year mark. About 40% of patients were completely pain-free at follow-up.7British Journal of Sports Medicine. A 5-year follow-up study of Alfredson’s heel-drop exercise programme in chronic midportion Achilles tendinopathy
That sounds encouraging, and it is, but the same study revealed an important caveat: nearly half of the patients had received one or more additional treatments during the follow-up period. Some had gone on to try shockwave therapy, injections, or even surgery. So the five-year improvement cannot be attributed solely to the heel drop program. The honest interpretation is that eccentric heel drops provide a good starting point and a solid initial improvement for many people, but a substantial portion of patients with chronic Achilles tendinopathy will eventually need something more.8British Journal of Sports Medicine. A 5-year follow-up study of Alfredson’s heel-drop exercise programme in chronic midportion Achilles tendinopathy
What Happens Inside the Tendon During Heel Drops
Researchers have tried to understand why eccentric loading helps the Achilles tendon when other types of exercise often do not. One investigation measured the pressure inside the tendon itself during different loading conditions: a bent-knee calf stretch, a straight-knee calf stretch, and an eccentric heel drop. The eccentric heel drop produced the highest intratendinous pressures of the three, and the highest pressures were consistently found at the deep insertion region of the tendon, which is exactly where Achilles tendinopathy most commonly develops.9PubMed. Intratendinous pressure changes in the Achilles tendon during stretching and eccentric loading: Implications for Achilles tendinopathy This suggests that the compressive forces generated during the exercise may be part of the therapeutic mechanism, though whether compression is ultimately helping to remodel damaged tissue or carries its own risks at higher loads is still being studied.
A separate study using ultrasound-based imaging measured what happens to tendon and muscle stiffness immediately after a session of heel drop exercises. The stiffness of the Achilles tendon itself increased by roughly 42% after the exercise bout, while the calf muscles behind it stiffened even more dramatically, by about 72 to 75%.10PubMed Central. Sonographic evaluation of the immediate effects of eccentric heel drop exercise on Achilles tendon and gastrocnemius muscle stiffness using shear wave elastography These are acute, short-term changes, not permanent ones, but they give a window into the mechanical environment the exercise creates. The tendon is being loaded in a very specific way that other forms of calf work do not replicate, which likely explains why generic strengthening exercises are not an equivalent substitute.
Common Mistakes With Heel Drop Exercises
If you have been prescribed eccentric heel drops for Achilles tendinopathy, a few practical pitfalls are worth knowing about. The first is speed. The exercise works because the lowering phase is slow and controlled, usually taking three to five seconds. Dropping quickly turns it into a different type of load and removes the eccentric stimulus that the protocol depends on. Many people unconsciously speed up once the exercise starts to feel easy, which undermines the point.
The second mistake is stopping too soon. The Alfredson protocol was designed as a twelve-week daily commitment, and many patients feel significantly better by week four or five and discontinue. Early improvement in pain does not mean the tendon has finished remodeling. Tendons adapt much more slowly than muscles, and cutting the program short increases the chance of the pain returning.
The third is avoiding all discomfort. The original protocol explicitly states that the exercise should be performed through mild pain. This feels counterintuitive, and some patients (and some clinicians) modify the protocol to be pain-free, but the research that established the protocol’s effectiveness was done with the mild-pain instruction in place. There is a meaningful difference between “this is uncomfortable” and “this is getting worse,” and learning to distinguish the two is part of successful rehab. If pain escalates during or after each session rather than staying flat or gradually decreasing over weeks, that warrants re-evaluation.
Finally, the protocol specifically calls for the exercise to be done on a step or ledge so the heel can drop below the level of the forefoot. Performing it on flat ground removes the portion of the range of motion where the eccentric load is greatest, essentially diluting the exercise. If you do not have access to a step, a thick book or a stair will work, but flat-ground heel raises are not the same thing.
When the Achilles Heel Drop Does Not Apply
The Alfredson protocol was developed specifically for midportion Achilles tendinopathy, meaning pain and thickening in the middle section of the tendon, usually two to six centimeters above where it attaches to the heel bone. It was not designed for insertional tendinopathy, which involves the lower portion of the tendon right where it connects to the calcaneus. Insertional tendinopathy involves compression of the tendon against the bone, and the deep dorsiflexion position at the bottom of a heel drop can actually aggravate that compression. Patients with insertional problems are often advised to limit the range of motion, performing the exercise only to the level of the step rather than dropping below it. This distinction matters, because the wrong version of the exercise can make the wrong type of tendinopathy worse.
The exercise is also not appropriate for acute Achilles tendon ruptures, which are a completely different injury. A rupture involves a partial or complete tear of the tendon, and loading it eccentrically in the early stages of healing could be harmful. The heel drop protocol is for chronic, degenerative tendon conditions where the tendon is thickened and painful but structurally intact. If your Achilles injury was sudden, involved a popping sensation, and made it difficult to push off your foot, that needs a medical evaluation before any exercise protocol begins.