The Levine Protocol, Explained: Where It Came From and How It Changed

The short answer.

The Levine Protocol is a graded exercise program for POTS developed by cardiologist Dr. Benjamin Levine at the Institute for Exercise and Environmental Medicine in Dallas. It starts with recumbent cardio — lying or reclining — and progresses toward upright exercise over several months. The version most patients actually follow is a later adaptation from the Children’s Hospital of Philadelphia.The short answer.** The Levine Protocol is a graded exercise program for POTS developed by cardiologist Dr. Benjamin Levine at the Institute for Exercise and Environmental Medicine in Dallas. It starts with recumbent cardio — lying or reclining — and progresses toward upright exercise over several months. The version most patients actually follow is a later adaptation from the Children’s Hospital of Philadelphia.

Why nobody can tell you how long it takes

Search for the Levine Protocol and you’ll get three different answers about its length. Three months. Seven months. Eight months. The sources contradict each other, and none of them explain why.

Here’s why: there are two different documents, and they get called by the same name.

The research protocol ran three months. That’s the program Levine’s team used in their published studies, and it’s where the outcome data comes from.

The patient protocol — the PDF that circulates in Facebook groups, gets emailed by cardiologists, and shows up on the fourth page of search results — runs eight months. It’s a longer, gentler, week-by-week adaptation built for people following it at home without a supervised lab.

When someone says “the Levine Protocol is three months,” they mean the study. When someone says eight, they mean the handout. Both are correct and they’re talking about different things.

Where it came from

The protocol grew out of a question about the heart itself. In 2010, Levine’s group at the Institute for Exercise and Environmental Medicine — a joint program of Texas Health Presbyterian Hospital Dallas and UT Southwestern — published a study in the *Journal of the American College of Cardiology* asking whether POTS might be, at least partly, a problem of cardiac size. They imaged 27 patients and measured their blood volume.

What they found: patients with POTS tended to have smaller hearts and less circulating blood than healthy controls. A smaller ventricle pumps less blood per beat. If each beat moves less blood, the only way to maintain output when you stand up is to beat faster. The tachycardia isn’t the disease doing something arbitrary — it’s the compensation working correctly on an undersized system.

This finding is sometimes nicknamed “Grinch syndrome,” after the heart two sizes too small.

The clinical implication follows directly. Cardiac muscle responds to training. If reduced cardiac mass and low blood volume are contributing to orthostatic intolerance, then a training program that increases both should reduce it.

That’s the entire thesis of the protocol. It isn’t “exercise is good for you.” It’s a specific structural hypothesis with a specific intervention attached.

What the research showed

Of the 27 patients evaluated, 25 began a three-month training program and 19 completed it.

In a later review, Fu and Levine summarized the physiological changes across their training work: roughly an 8% increase in peak oxygen uptake, a 12% increase in cardiac size, an 8% increase in cardiac mass, and a 6% increase in blood volume after three months of training.

A frequently cited figure holds that just over half of participants no longer met diagnostic criteria for POTS at the end of the program.

Two things are worth holding onto about these numbers. First, they’re small studies — dozens of people, not thousands. Second, they measure people who *completed* the program, and completion rates in graded exercise research are consistently imperfect for reasons that matter. Nineteen of twenty-five finished. The six who didn’t are part of the picture.

Why it starts lying down

The signature feature of the protocol is that the first months contain no upright cardio at all.

The logic is that orthostatic stress and training stress are two separate loads, and stacking them is what makes conventional exercise fail for POTS patients. Standing up already costs you something. Adding cardiovascular demand on top of that cost means you hit your symptom ceiling long before you reach a training stimulus — you stop because you’re presyncopal, not because your heart got a workout.

Remove the orthostatic load and the ceiling lifts. Recumbent cycling, rowing, and swimming all let you reach a genuine training heart rate while horizontal. You get the cardiac stimulus without paying the postural tax.

Then, once the cardiac and blood-volume adaptations have accumulated, the postural load gets added back gradually — reclined, to seated upright, to standing.

The progression isn’t a difficulty curve. It’s an *angle* curve. That distinction is the thing most summaries get wrong.

What CHOP changed

The Children’s Hospital of Philadelphia adapted Levine’s work into what’s now distributed as the CHOP Modified Dallas POTS Exercise Program, developed for adolescent patients and now used well beyond that population.

The clinical logic is unchanged. What CHOP added was usability:

- A week-by-week schedule. Every week specifies its sessions rather than describing a phase in general terms.

- Eight months instead of three. A slower ramp, with more time in each position before the angle changes.

- Explicit strength training days alongside the cardio schedule.

- Free public distribution. The program is available as a PDF through Dysautonomia International, which is why it’s the version most patients encounter.

Broadly, the arc runs recumbent for the first three months, introduces an upright bike around month four, adds treadmill walking or elliptical around month five, brings in interval work around month six, and becomes individualized through months seven and eight before transitioning to maintenance.

CHOP also produced a recumbent-focused program that uses rated perceived exertion rather than prescribed heart-rate zones — relevant for patients who don’t have a clinician-set target range, or whose heart rate isn’t a reliable guide to effort.

Levine, Dallas, CHOP: which is which

These names get used interchangeably, and mostly that’s fine, but the distinctions are:

Dallas Protocol and Levine Protocol refer to the same lineage — Levine’s program, named either for the man or the city. Any difference between them is negligible in practice.

CHOP Modified Dallas is the adaptation described above. When someone in a support group says “I’m doing the Levine Protocol,” this is usually what they mean.

If you’re comparing two sources and they disagree, check which document each is describing before assuming one is wrong.

What it isn’t

The protocol is not a cure, and it isn’t right for everyone.

The most important limitation: graded exercise can cause lasting harm to people who experience post-exertional malaise.

PEM — a disproportionate, delayed worsening of symptoms after exertion — is a defining feature of ME/CFS, and it overlaps meaningfully with POTS.

In people with PEM, incremental exercise programs don’t build capacity. They deplete it, sometimes durably.

This is not a caveat to skim past. Screening for PEM before starting any graded program isn’t optional caution, it’s the difference between a program that helps and one that causes damage.

Beyond that: the protocol assumes you can be prescribed heart-rate targets or can judge exertion reliably; it assumes access to a recumbent bike, rower, or pool; and it assumes a level of baseline function that not everyone has. Hypermobility and hEDS require modifications the base protocol doesn’t specify.

Talk to your physician before starting. That sentence appears at the bottom of every article like this one, and here it carries real weight — the heart-rate zones in the original program are meant to be individually prescribed, not estimated from a formula on the internet.