Statins Arrest Heart Disease. Exercise Can Reverse it.
It’s not just theory anymore.
Dr. Kevin Ham, MD
“He has made everything beautiful in its time. He has also set eternity in the human heart; yet no one can fathom what God has done from beginning to end.”
Ecclesiastes 3:11
I completed the Levi Gran Fondo. 113 miles, 3000m of climbing and 8 hours in the bike saddle. But the most important stat: my average heart rate was just 135 beats per minute (bpm) despite the huge effort. I did take it ‘easier’ just going at zone 2 effort, applying the arterial pressure wash throughout, supercharging my HDL to reverse plaque. I felt great.
One fellow rider asked me, “How do you know you won’t get a hard attack on these hard climbs?” The simple answer. I don’t truly know. But I have 0% low attenuated plaque, my heart flow is improving, so I am doubling down, treating my plaque as Stage 4 heart disease.
Let me tell you, some hills were very challenging. 400m with 10%-16% grade elevation. But I trained on 25% grade in the big, hard ring for years, so mentally, seeing these didn’t faze me at all, and I just befriended them as my therapeutic medicine to reverse my plaque.
In my last newsletter, Does Exercise Reverse Plaque, many readers asked me about those who could not do High Intensity Interval Training (HIIT).
First, HIIT is just relative to your maximum heart rate, which is a rule of thumb: 220 minus your age. So, walk briskly for x period of seconds or minutes where it is hard to talk. That’s HIIT. As your body chemistry changes with your CAST Reversal Diet, increase your HIIT duration and intensity as tolerated. Note that exercise is more of a mental exercise than physical exercise.
And for the most severe cardiac patients, which Dr. Esselstyn treated, who had bypasses, stents, meds and had no more hope, he arrested and reversed their heart disease for at least the next 14 years and beyond. These were effectively “Stage 4” Heart disease patients. It’s quite remarkable. He did not advise or prescribe any exercise. In fact, his patients could barely even walk across the room without angina or claudication. Even shaving was an effort for some.
But the ones who exercised improved a lot, like Dr. Joe Crowe, younger at 44, who reversed his severe LAD blockages in just 32 months. I asked Dr. Esselstyn last month if Dr. Crowe exercised. He said, “Yes, he did.”
While I am 55 and my plaque is 11 years older than Dr. Crowe’s, I do have 33% soft, fibrous plaque, which is reversible. So I put my faith in both Dr. Esselstyn’s 10% low-fat whole-food plant-based (WFPB) diet with no oils, nuts, coconuts, or avocados. But I am doubling down on HIIT based on the evidence and have added a few walnuts per day, with Dr. Esselstyn's cautionary advice not to eat too many nuts, as they can impede endothelial cells in the arterial walls.
As you may know, I had bilateral plaque in the carotid arteries, now all gone. It seems almost miraculous, so I am studying the studies to understand the mechanism of how and what happened for such a remarkable result. I have reviewed the major carotid artery studies on exercise.
Do the Carotid Studies Show Reversal?
“Read not to contradict and confute, nor to believe and take for granted, but to weigh and consider."
Francis Bacon
The carotid is the artery that runs up the side of your neck and supplies your brain with blood. It is also where stroke begins. When carotid plaque ruptures, a clot forms, breaks loose, and travels into the cerebral circulation. Carotid plaque starts forming in your 30s, so much younger than your coronary plaque, which starts in childhood.
The carotid is not just a proxy for the rest of the arterial tree. It is the artery that decides whether you can walk or lift your right arm.
It is also the easiest artery in the body to image. 20 minutes of ultrasound—no contrast, no radiation, repeatable as often as you want, and relatively inexpensive. I get mine for $140 USD.
Let’s look at a couple of the carotid trials that matter most.
1. Okada, 2022. The largest meta-analysis we have.
Published in the Journal of Physical Activity and Health in 2022. The most comprehensive review of exercise effects on carotid wall thickness ever assembled.
Patients. 1,370 adults across 26 randomized controlled trials. 32 study groups in total. 24 of the 32 groups enrolled patients with documented disease. Mean ages ranged from the early 20s to mid-70s across studies.
Exercise. Multiple modalities across the 32 groups: aerobic, resistance, combined aerobic plus resistance, high-intensity interval, moderate-intensity continuous, and endurance training. The paper analyzed each separately.
Duration. From 2 to 12 months. Most trials ran 6 months or less.
Control. Usual care. Controls maintained their habitual activity. Sedentary controls were specifically excluded.
Results
Pooled effect of exercise on CIMT: Weighted mean difference −0.02 mm against controls (95% CI −0.03 to −0.01)
Aerobic alone: −0.02 mm (95% CI −0.04 to −0.01). The largest single-modality effect
Resistance alone: −0.01 mm (95% CI −0.02 to −0.00). Smaller, but statistically significant
Duration > 6 months: Reduction of 0.02 mm with no heterogeneity (I² = 0). The effect was clean and consistent
Baseline CIMT < 0.7 mm: No effect (95% CI −0.03 to 0.00). Healthy walls did not change
Baseline CIMT ≥ 0.7 mm: −0.03 mm. The effect was concentrated in patients with measurable disease
Bottom line: Exercise reduces carotid wall thickness in adults, even though minimally. Aerobic exercise produces the largest effect. The effect is concentrated in people who already have disease, and trials longer than 6 months produce the cleanest signal.
20 micrometres across 26 trials is a real effect, but a modest one. It is the average of every kind of exercise at every dose at every duration. My own carotid moved 700 micrometers in 90 days. 35 times the pooled effect. That gap is the question this whole series exists to answer.
2. Ghardashi-Afousi, 2020. The fastest published carotid regression on exercise alone.
Published online in November 2019 in the Journal of Diabetes and its Complications, with 2020 final citation. The reason this study matters is its speed: 12 weeks. The closest analog on timeline to my own three-month result.
Patients. 74 sedentary patients with type 2 diabetes were recruited from the Diabetes Clinic at Shariati Hospital in Tehran—mean age 55. Inclusion required fasting blood glucose above 7 mmol/L and HbA1c above 7%. Randomized 1:1 to HIIT or control.
Exercise. High-intensity interval training on a stationary bike. 6 intervals, 4 minutes each, at 85% to 90% of maximum heart rate. 3 minutes of active recovery between intervals at 45% to 50% of maximum heart rate. 3 supervised sessions per week.
Duration: 12 weeks of training, with carotid ultrasound at baseline and follow-up.
Control. Continued usual diabetic care, no exercise prescription, no significant change in CIMT or other vascular measures at 12 weeks.
Results
CIMT in the HIIT group: Decreased from 0.83 mm to 0.71 mm. A 14% absolute reduction in 12 weeks (p < 0.001)
CIMT in controls: Unchanged. 0.84 mm at baseline, 0.85 mm at follow-up
Wnt pathway markers: Serum Dkk-1 and sclerostin both fell significantly in the HIIT arm. These are the molecular inhibitors of Wnt signalling that drive vascular calcification. They went down because the calcification signal went down
VO2 peak: Improved significantly in the HIIT arm. No change in controls
Bottom line: 12 weeks of supervised HIIT produced a 14% absolute reduction in carotid wall thickness in diabetic patients. The mechanism mapped to the Wnt pathway, quieting and calcification suppression
This is 24 minutes of High Intensity and 18 minutes of Interval, so the total time is 42 minutes. At 3 times per week, that is 2 hours 6 minutes. I do 4x this amount. And I had 53% CIMT reduction in 12 weeks.
A short word on the Wnt pathway
This is the first time I have heard of this pathway. Like meeting a new friend! The Wnt pathway is one of the most ancient signalling systems in animal biology. It is named for the Wingless gene first identified in fruit flies and the int-1 gene in mice. Wnt is what tells a cell where it is, what tissue it should become, and when to grow. It builds your skeleton in the womb. It maintains your stem cells. And inside the wall of an adult artery, it is one of the master switches that decides whether vascular smooth muscle cells stay quiet or transform into bone-like cells that lay down calcium.
Wnt signalling works by ligand and receptor, like a hand in glove catching a ball. A Wnt protein binds a Frizzled receptor on the cell surface, partnered with an LRP5 or LRP6 co-receptor. That binding stabilizes a protein called beta-catenin inside the cell. Beta-catenin moves to the nucleus and switches on the genes that drive osteogenic transformation. In the artery wall, those genes turn ordinary smooth muscle cells into calcium-depositing cells. That is the molecular beginning of the calcification you see on a CT scan as a CAC score.
The body has built-in brakes on this pathway. They are called Wnt inhibitors. The two most studied in vascular disease are Dkk-1 (Dickkopf-1) and sclerostin. They are circulating proteins that bind to LRP5 and LRP6 and physically block the Wnt signal from getting through. They keep tissues from over-calcifying.
Here is the counterintuitive part. In healthy biology, more Dkk-1 and sclerostin should mean less calcification. In atherosclerotic disease, the relationship inverts. Diseased arteries chronically express more Dkk-1 and sclerostin precisely because the calcification process is already running and the body is trying, ineffectively, to hold it back. Elevated levels of these inhibitors in the blood are a marker that the disease is active. The brakes are on, but the wheels are still turning.
Ghardashi-Afousi found that 12 weeks of HIIT lowered both Dkk-1 and sclerostin in the blood. That sounds like the brakes coming off. It is actually the opposite. When the calcification signal upstream of Dkk-1 quiets down, the body no longer needs to crank up the brakes. Inhibitor levels fall because the disease they were inhibiting is fading. The same drop in Dkk-1 and sclerostin that would be alarming in a healthy person is, in a diabetic with subclinical atherosclerosis, a signal that the artery is beginning to heal.
HIIT drives this through two mechanisms.
First, the mechanical signal. High-velocity blood flow during interval work shears against the endothelium and tells it to upregulate endothelial nitric oxide synthase. Nitric oxide is one of the master suppressors of vascular smooth muscle cell osteogenic transformation. More nitric oxide means less Wnt activation upstream.
Second, the metabolic signal. HIIT lowers insulin resistance and circulating glucose, which lowers AGEs (advanced glycation end products), which are themselves potent activators of Wnt signaling in vascular tissue. Quieter glucose, quieter Wnt, quieter calcification.
This trial tells me 3-month carotid regression is biologically plausible at the right dose. 14% in 12 weeks. My result was 53% in 12 weeks. Roughly 4 times larger. The mechanism Ghardashi-Afousi identified, Wnt pathway suppression through HIIT-driven shear stress and nitric oxide upregulation, is one of the levers I was running. It was not the only one. I am running 5 levers at once.
How Does Exercise Compare to Statins?
“Statins halt progression of carotid wall thickness. Exercise at the right dose reverses it and combined with the powerful effects of the CAST diet, reverses it synergistically.”
Kevin Ham, MD
If you are reading this with a CAC score and a prescription for a statin, the question you actually want answered is whether exercise comes anywhere near what a drug can do.
The honest answer is that it depends on which drug, in which patient, at which dose. Here is the cleanest comparison the literature offers.
1. Rosuvastatin alone (METEOR, 2007)
Trial: 984 low-risk subjects with mild carotid wall thickening. Randomized to rosuvastatin 40 mg or placebo for 2 years
LDL change on rosuvastatin: Mean baseline 155 mg/dL fell to 78 mg/dL. A 49% reduction
CIMT in rosuvastatin arm: −0.0014 mm/year. Essentially zero. The statin halted progression
CIMT in placebo arm: +0.0131 mm/year. The disease moved forward
Translation: A high-dose statin held the line. It did not regress the wall
2. Statin plus PCSK9 inhibitor (SLICE-CEA, evolocumab on top of statin)
Trial: 52 Asymptomatic high-risk patients, evolocumab 420 mg monthly added to maximally tolerated statin, 12 months
LDL change: 93 mg/dl to 31 mg/dL on combined therapy
Vessel wall volume: No significant difference vs usual care. Lipid-rich necrotic core of plaque significantly reduced
Cost: Approximately $6,000 per year in addition to the statin
Translation: Drugs can produce stabilization of the dangerous character of plaque but not reverse plaque.
3. High-intensity exercise alone (Ghardashi-Afousi, 2020)
Trial: 74 sedentary diabetics, 12 weeks of HIIT, no medication change
LDL change on exercise: Modest. The Pattyn meta-analysis pegs exercise alone at −7.2 mg/dL on average
CIMT change: 0.83 mm to 0.71 mm. A 14% absolute reduction in 12 weeks
Cost: Free
Translation: Exercise at HIIT intensity produced absolute regression that a 2-year course of high-dose rosuvastatin did not produce
This is the headline that should make every cardiologist who reads it jump for joy and become an evangelist for HIIT. High-intensity exercise produces carotid regression at a magnitude that high-dose rosuvastatin alone could not match in 2 years. With a fraction of the LDL movement. Through a different mechanism. PCSK9 inhibitors stacked on a statin can produce arrest of plaque but not meaningful regression, at significant cost. The biology of regression is real and is accessible by multiple paths. Exercise at the right dose is one of them.
What Does Exercise Do to the Blood?
“Exercise is a prescription that enhances the right diet but if your diet is toxic, then exercise accelerates its toxic effects.”
Kevin Ham, MD
If exercise reverses carotid plaque, exercise must be doing something to the blood that affects the plaque. Something measurable. Something a cardiologist could, in principle, find on a lab draw. So I went to the lipid literature, looking for the part of the lipid panel that exercise moves the most. What I found was not what I expected.
A 2024 meta-analysis in Sports Medicine by Pattyn and colleagues pooled 148 randomized controlled trials of exercise interventions on blood lipids. The averages, expressed as the difference exercise alone produces against a non-exercising control on the same baseline diet:
• LDL: −7.2 mg/dL
• Triglycerides: −8.0 mg/dL
• HDL: +2.1 mg/dL
That is the honest magnitude of exercise on the lipid panel. Disappointing. It is not biologically meaningless, especially compounded across decades. But it is small compared with what a statin does. Smaller still compared with what the Esselstyn diet does. Exercise will not move an LDL of 168 to 61. No trial has ever shown that it can. My LDL came down on the diet, not on the bike.
Which leaves a problem. If exercise barely moves the lipid panel, and if the lipid panel is supposedly the upstream driver of plaque, how does exercise reverse plaque at all?
Exercise does not move plaque through the lipid panel. It moves plaque through something the lipid panel does not see.
The Measurement That Actually Matters to Plaque Reversal
“HDL number tells you how much cholesterol is in the blood. Efflux capacity tells you how well it is working. The number on your lipid panel is a passenger count. Efflux is the exhaust engine.”
Kevin Ham, MD
There is a process inside your arteries that you have probably never heard of. It is called reverse cholesterol transport. It is your system for taking cholesterol out of the wall of an artery and sending it to the liver to be excreted in bile. The scientific term for this is Efflux Capacity. It is the disease running in reverse. It is regression, expressed as biology.
Picture a single foam cell, deep in the wall of your carotid artery. A macrophage that swallowed too much oxidized LDL 20 years ago and has been sitting there ever since, swollen, slow, dying by inches. On the surface of that cell are pumps. Two of them, named ABCA1 and ABCG1. Their job is to push cholesterol out of the cell, across the cell membrane, onto a passing HDL particle in the bloodstream. The HDL particle, now loaded, drifts away with its cargo and delivers it to the liver.
Exercise upregulates ABCA1 and ABCG1. More pumps. More efflux. More plaque leaving the wall. The lipid panel does not measure pumps. The lipid panel counts particles. 3 studies in the last 20 years have measured what exercise actually does to the efflux engine itself, and they tell a single, escalating story.
1. Olchawa, 2004. Athletes have more fuel pumps.
Published in Arteriosclerosis, Thrombosis, and Vascular Biology in 2004.
Design. Cross-sectional comparison of 18 endurance athletes (cyclists and runners) versus 18 age and sex-matched sedentary controls. Mean age 32. All non-smokers, all on no medications, all with normal lipid panels.
What was measured. HDL particle subspecies (pre-beta-1, alpha-1, alpha-2 by 2D gel electrophoresis), LCAT activity, CETP activity, and macrophage cholesterol efflux capacity using J774 cell assay.
Results
Pre-beta-1 HDL: +46% in athletes (p < 0.001). This is the HDL subspecies that actually picks up cholesterol from ABCA1
LCAT activity: +23% in athletes. The enzyme that locks cholesterol onto HDL so it cannot fall back off
Cholesterol efflux capacity: Significantly higher in athletes from macrophages loaded in vitro
Total HDL: Higher, but only by about 15%. Far less than the functional measurements
The athletes did not just have more HDL. They had HDL that worked. The same number on a lab report can mean two completely different things in the body, depending on whether the engine is running.
2. Sarzynski, 2022. The engine builds in 12 weeks.
Published in the Journal of the American Heart Association in 2022.
Patients. 61 healthy young men, mean age 24, randomized to 12 weeks of moderate intensity exercise or sedentary control.
Exercise. Treadmill running, 4 to 5 sessions per week, 30 to 45 minutes per session, at 65% to 80% of VO2 max. Heart rate is monitored at every session.
Control. Maintained a sedentary lifestyle. No change in efflux capacity or HDL composition at 12 weeks.
Results
Total cholesterol efflux capacity: +10.6% (p < 0.05)
ABCA1-mediated efflux capacity: +13.5% (p < 0.01). The engine specifically
Total HDL concentration: Barely changed. The number on the lipid panel did not move
HDL particle profile: Shifted toward smaller, denser particles, the more functionally active subspecies
The implication is one most cardiologists have not internalized. You can be working hard on exercise, watching your lipid panel and seeing nothing move, and meanwhile the efflux engine inside the panel is becoming dramatically more powerful. The lab report cannot see what you are building.
3. Rohatgi, 2014. The efflux engine predicts whether you live or die.
Published in the New England Journal of Medicine in 2014. The most cited paper in the cholesterol efflux capacity literature.
Patients. 2,924 adults from the Dallas Heart Study, a population-based cohort of Dallas County residents. Mean age 42, 51% women, multi-ethnic. None had known cardiovascular disease at baseline.
What was measured. Cholesterol efflux capacity at baseline using a validated cell-based assay, alongside the standard lipid panel.
Follow up. Median 9.4 years. The primary endpoint was incident cardiovascular events: myocardial infarction, stroke, coronary revascularization, and cardiovascular death.
Results
Highest quartile vs lowest quartile of efflux capacity: 67% reduction in cardiovascular events (HR 0.33, 95% CI 0.19 to 0.55)
Independent of HDL concentration: Yes. The relationship persisted after adjustment for HDL-C
Independent of LDL: Yes
Independent of all traditional risk factors: Yes. After adjustment for age, sex, race, smoking, diabetes, hypertension, LDL, HDL, and family history
Two-thirds fewer heart attacks and strokes, predicted by a measurement your cardiologist almost certainly has not run, cholesterol efflux that exercise raises by more than 10% in 12 weeks, which the standard lipid panel cannot see.
I believe this is where an important component of my 3-month carotid result came from. The lipid panel moved through diet but the HIIT efflux engine moved cholesterol efflux enormously. I cannot prove it, because nobody is running serial efflux capacity assays on me, but the biology fits the result, and the trial data fits the biology.
A Question You Should Ask Yourself
For yourself. For someone you love. Answer them in the quietness of your day.
If the most aggressive drugs for lowering cholesterol cannot reverse your plaque, what will?
Taking a pill will slow down the progression, but not reverse it. Even though my friend Rob was on a statin since age 34 (LDL ~80-90), he still died of a sudden heart attack at 58 years. He had no other risk factors or symptoms.
For Someone You Love
There is someone in your life building plaque. Most are. You thought of them. Send this to them. Your loved ones just need the information to act and a guide to help them.
Keep going. The race is long, the road is beautiful, and the body was built to heal.
Grace, strength and love to you.
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Meaning
I pray you unlock your heart to reach the height of your full potential by discovering your calling.
Kevin Ham, MD
Appendix
The summary of the referred exercise studies:
1. Okada Y, et al. Effect of exercise on carotid artery intima media thickness in adults: a systematic review and meta analysis. J Phys Act Health. 2022;19:855 to 867.
26 randomized trials, 1,370 participants. Pooled weighted mean difference of −0.02 mm. Aerobic produced the largest effect. Subgroup analysis showed effect doubled in trials lasting more than 6 months in patients with disease at baseline.
2. Ghardashi-Afousi A, et al. Improved carotid intima media thickness induced by high intensity interval training associated with decreased serum Dkk 1 and sclerostin in type 2 diabetes. J Diabetes Complications. 2020;34(1):107469.
74 sedentary diabetics, 12 weeks of HIIT (6 intervals of 4 minutes at 85% to 90% maximum heart rate, 3 sessions per week). CIMT fell 14% absolute. Wnt pathway markers Dkk-1 and sclerostin both fell. The fastest published carotid regression on exercise alone.
3. Crouse JR, et al. Effect of rosuvastatin on progression of carotid intima media thickness in low risk individuals with subclinical atherosclerosis: the METEOR trial. JAMA. 2007;297:1344 to 1353.
984 low-risk subjects, 2 years of rosuvastatin 40 mg vs placebo. LDL fell 49% (155 to 78 mg/dL). CIMT essentially flat at −0.0014 mm/year on statin vs +0.0131 mm/year on placebo. Statin halted progression but did not produce regression.
4. Pattyn N, et al. The effect of exercise training on blood lipids: a systematic review and meta analysis. Sports Med. 2024;54:1 to 28.
148 RCTs. Exercise alone effects on lipids: LDL −7.2 mg/dL, TG −8.0 mg/dL, HDL +2.1 mg/dL. The honest baseline magnitude of exercise on the standard lipid panel.
5. Olchawa B, et al. Physical fitness and reverse cholesterol transport. Arterioscler Thromb Vasc Biol. 2004;24:1087 to 1091.
18 endurance athletes vs 18 sedentary controls. Athletes had +46% pre-beta-1 HDL, +23% LCAT activity, and significantly higher macrophage cholesterol efflux capacity. The functional HDL measurements were 2 to 3 times more elevated than the simple HDL concentration.
6. Sarzynski MA, et al. Moderate and high intensity exercise improves lipoprotein profile and cholesterol efflux capacity in healthy young men. J Am Heart Assoc. 2022;11:e023386.
61 young men, 12 weeks of moderate intensity treadmill running 4 to 5 days per week. ABCA1-mediated efflux capacity rose 13.5%. Total HDL barely changed. Function moved before concentration did.
7. Rohatgi A, et al. HDL cholesterol efflux capacity and incident cardiovascular events. N Engl J Med. 2014;371:2383 to 2393.
Dallas Heart Study, 2,924 adults, median 9.4 year follow up. Highest quartile of efflux capacity had 67% fewer cardiovascular events than lowest quartile. Independent of HDL concentration, LDL, and every traditional risk factor.
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