Frequently Asked Questions About Dr. London Heart Engine Optimisation Protocol
20 answers covering everything from basics to advanced usage.
// Basics
What exactly does ejection fraction measure?
Ejection fraction measures the percentage of blood ejected from your left ventricle with each heartbeat. If your ventricle fills with 100ml and pumps out 60ml, your EF is 60%. Normal is 50–70%. It reflects how efficiently your heart performs its core job — moving oxygenated blood to fuel every organ in your body.
What is the closed loop pump model of the heart?
Dr. London describes the heart as a simple closed loop pump: the right side fills and sends blood to the lungs, the left side receives oxygenated blood and ejects it to the body, repeating continuously. Any inefficiency in this loop — stiffness, blockage, leakage, or rhythm disruption — reduces the cardiac output fuelling every organ.
What is the Lavine Protocol exactly?
The Lavine Protocol is Dr. Ben Lavine's 2018 structured aerobic exercise intervention: 4–5 aerobic sessions per week, including 1 very high-intensity session and 1–2 cross-training or active-recovery days, ramped up gradually and sustained over two years. It produced up to an 18% VO2 max improvement and ventricular elasticity comparable to hearts nearly 20 years younger.
Why does Dr. London call the heart an engine?
The engine analogy captures the protocol's essence: fuel it properly with a whole foods diet, keep it running properly with solid lifestyle choices, and take it out for a drive often with structured aerobic exercise. The more consistently you do this, the more miles — and better quality miles — you get from your heart.
// How To
How do I start the Lavine Protocol if I've been sedentary for years?
Start with a slow, gradual ramp-up — never at full volume. Begin with lower-intensity aerobic sessions and progressively add duration and intensity over weeks. Don't add the high-intensity day until your base is established. If you have cardiac history, get medical clearance and consider a supervised cardiac rehab entry point before building toward the full 4–5 sessions per week.
How do I figure out which root cause category applies to me?
Map your situation to the five categories: direct muscle damage (prior heart attack, myocarditis, chemo), pressure overload (hypertension, aortic stenosis), volume overload (leaking valves), rhythm disturbances (atrial fibrillation), and lifestyle factors (sedentary, metabolic issues, alcohol). An echocardiogram plus your medical history reveals which apply. Multiple categories can coexist — note all of them, since each drives a different intervention.
How do I track whether the protocol is working?
Track progress via repeat echocardiogram to assess ventricular elasticity and ejection fraction, and VO2 max testing as the functional cardiovascular efficiency marker. In the Lavine study, VO2 max increased up to 18%. Reassess at 6–12 months. Remember that EF decline can happen without symptoms, so objective measurement — not how you feel — is the reliable indicator.
What complementary lifestyle changes support the aerobic training?
Aerobic training is the primary lever, but you must add: a structured, consistent strength training program to maintain muscle; adequate weight control; blood pressure management; and a solid whole foods diet. These aren't optional extras — Dr. London treats them as cornerstones of lifestyle changes that directly affect ejection fraction and are part of the complete protocol.
// Troubleshooting
What if I have no symptoms — do I still need to worry about EF?
Yes. EF decline can occur completely without symptoms — it sneaks up on you. Waiting for symptoms like shortness of breath or fluid retention before investigating is a critical error. The key is to identify stiffening and reduced function early via echocardiogram, when lifestyle and medical interventions have the greatest chance of success.
I do yoga regularly — isn't that enough for my heart?
Not for reversing cardiac aging. In the Lavine study, the yoga/stretching control group showed no significant improvement in ventricular elasticity or VO2 max. Yoga has many benefits, but it doesn't provide the aerobic dose needed to improve cardiovascular efficiency. You need structured aerobic training with a high-intensity component to reverse ventricular stiffening.
My EF is 45% — is that dangerous?
An EF of 45% is at the low end of normal, approaching the 40%-or-less heart failure threshold — Dr. London would call this a 'crystal ball moment.' It warrants attention: verify it with a repeat echocardiogram, identify the root cause, and begin lifestyle intervention. If there's cardiac history, ramp exercise carefully and get medical clearance, potentially through supervised cardiac rehab.
What if I have multiple risk factors at once?
Multiple root cause categories often coexist — for example, a sedentary lifestyle plus uncontrolled hypertension (pressure overload). Note all applicable categories and address each. The lifestyle intervention (Lavine Protocol plus the complementary stack) applies broadly, but pressure overload also needs blood pressure management, and structural issues like valve problems may need parallel medical evaluation.
// Comparisons
How does this protocol compare to a generic cardio recommendation?
Generic advice says 'do some cardio,' but this protocol specifies dose, structure, and intensity: 4–5 sessions weekly, one high-intensity, one to two recovery days, ramped gradually and sustained for years. It's grounded in Dr. Lavine's controlled study showing measurable cardiac age reversal — not vague activity guidance. The specificity is what produces the 20-year reversal result.
How does the Heart Engine Protocol differ from standard heart failure treatment?
Standard heart failure treatment often leads with medication. This protocol treats lifestyle modification as the foundation and medication as the next layer, applied when needed. It also emphasises early, pre-symptomatic identification via echocardiogram — before formal heart failure develops — so intervention can reverse decline rather than just manage an established condition.
How does ejection fraction compare to BNP as a heart health measure?
Ejection fraction, measured by echocardiogram, is the primary and most important determinant of cardiac function and outcomes. BNP (Brain Natriuretic Peptide) is a blood test used as a general indicator of whether someone is in heart failure. BNP complements the echocardiogram but doesn't replace it — the echo directly images ventricles and valves, while BNP is a supporting signal.
// Advanced
Is high-intensity interval training necessary, or can I stick to steady cardio?
The Lavine Protocol specifically includes one very high-intensity session per week as part of its structure — it's not optional to the design. Steady-state aerobic training forms the base, but the high-intensity component contributes to the VO2 max gains and elasticity improvements. Introduce it only after establishing an aerobic base and, if you have cardiac history, with medical clearance.
How does pressure overload physically damage the heart?
In pressure overload — from chronic high blood pressure or aortic stenosis — the left ventricle faces excessive resistance when pumping. To compensate, the ventricle wall thickens and the chamber shrinks. Over time this thickening reduces filling capacity and pumping efficiency, and the heart eventually fails. This is why blood pressure management is essential when this category applies.
Why does a leaking valve reduce ejection fraction?
In volume overload, a leaking heart valve lets blood flow out of both the 'front and back doors.' This distends the heart, pulling muscle fibres apart, which makes contraction progressively inefficient. The heart works harder to move the same effective output, and ejection fraction falls. Valve repair or replacement may be needed alongside lifestyle changes.
Can I follow this protocol after a heart attack?
Yes, but with caution. Post-heart-attack, your root cause is direct muscle damage from scar tissue, and your EF may be reduced. Ramp into the Lavine Protocol more carefully than an otherwise-healthy person would, get medical clearance, and consider entering through supervised cardiac rehab. Confirm no ongoing coronary blockages warrant revascularisation first, then layer in aerobic training, diet, and strength work.
What does the 5-year mortality risk look like with low EF?
Dr. London describes ejection fraction as a 'crystal ball' for future health. At an EF below 40%, there's roughly a 40–50% increase in 5-year all-cause mortality — and this predictive signal appears before symptoms do. This is why early identification via echocardiogram and prompt intervention are so central to the protocol's philosophy.