What is lifestyle medicine?
Lifestyle medicine is a branch of medicine that uses evidence-based changes in daily behaviour, such as eating, physical activity, sleep and stress, to prevent, treat and in some cases reverse chronic disease. The American College of Lifestyle Medicine defines it as "the evidence-based medical specialty that treats root causes with therapeutic lifestyle interventions" (ACLM). It is delivered by clinicians and used alongside medication when medication is needed.
Most people already know that diet and exercise matter for the heart. What is less understood is the difference between knowing that and treating it as medicine. That difference is the subject of this post.
The six pillars of lifestyle medicine
The American College of Lifestyle Medicine organizes the specialty around six pillars. Each one has a direct line to cardiovascular health.
| Pillar | What it means | A heart-health example |
|---|---|---|
| Nutrition | Eating mostly whole, minimally processed, plant-predominant foods | Eating patterns built on vegetables, fruit, whole grains, legumes and nuts help lower blood pressure and LDL cholesterol, two of the main drivers of heart disease. |
| Physical activity | Moving daily, combining aerobic, strength and flexibility exercise | Regular aerobic exercise builds cardiorespiratory fitness, one of the strongest predictors of how long a person lives.⁵ |
| Restorative sleep | Seven to nine hours of quality sleep a night | The American Heart Association added sleep to its core measures of cardiovascular health, Life's Essential 8, in 2022.² |
| Stress management | Building healthy coping skills and resilience | Chronic stress is linked to higher blood pressure and to behaviours, such as poor sleep and smoking, that raise cardiovascular risk. |
| Avoiding risky substances | Avoiding tobacco, nicotine, excess alcohol and other harmful exposures | Life's Essential 8 counts all nicotine exposure, including vaping and secondhand smoke, against heart health.² |
| Social connection | Supportive relationships and a sense of purpose | An American Heart Association scientific statement linked social isolation and loneliness with a higher risk of heart attack and stroke.³ |
None of these pillars works in isolation. Sleep affects appetite, stress affects sleep, and social connection often determines whether exercise happens at all. Lifestyle medicine treats them as one system.
Why lifestyle medicine matters
The World Heart Federation estimates that up to 80% of premature heart attacks and strokes can be prevented (World Heart Federation). Most of that prevention runs through the six pillars above.
The effect holds even for people who inherit a higher risk. In 2016, a study led by Amit Khera and published in the New England Journal of Medicine followed more than 55,000 adults across four cohorts.¹ Among those at high genetic risk for coronary disease, a favourable lifestyle (not smoking, avoiding obesity, regular physical activity and a healthy diet) was associated with a 46% lower relative risk of coronary events.
Genes load the risk. Daily behaviour shapes how much of it is realized.
The evidence that behaviour matters is not the bottleneck. Measuring it, and dosing it like medicine, is.
Lifestyle medicine vs. wellness: the real difference is dose
On paper, lifestyle medicine and wellness are different concepts. In practice, the line is blurry, and not everyone draws it the same way, including some who practise lifestyle medicine. The label is not the problem.
The problem is measurement. Medicine manages a treatment by dosing it: a specific amount, prescribed for a specific person, ramped up or down, with an expected effect on outcomes. Lifestyle is rarely handled this way.
Following a "healthy heart plate" is good advice, but it is not a dose. Quantifying the proportion of greens on that plate starts to be one.
To treat lifestyle the way medical care treats a drug, clinicians would need answers to four questions:
- What are we measuring?
- How much of it are we measuring?
- How do we prescribe a quantity, and how quickly do we ramp it up?
- What reduction in disease, or in its complications, should a given ramp-up or rate of progression produce?
Few have approached lifestyle as medicine in this way, partly because the science is uneven across the pillars. Smoking has a well-quantified relationship with heart disease. Stress is harder: it is often measured only by self-report, and its link to outcomes is more difficult to put a number on. Physical activity is easier, because cardiorespiratory fitness can be measured objectively and tied to survival.⁵
This matters because of a simple principle: if clinicians cannot measure something, they struggle to manage it like other evidence-based treatments. Measurement is not a requirement for something to count as lifestyle medicine. But a pharmacology-style approach, with a dose, a ramp and a tracked response, would make it easier to build lifestyle into medical care pathways and to create accountability that is currently missing.
The experience of workplace wellness programs shows what happens without it. These programs deserve credit for putting nutrition, exercise and stress on the agenda for millions of employees. But in a randomized trial of about 33,000 employees across 160 worksites, published in JAMA in 2019, Song and Baicker found that a workplace wellness program increased self-reported exercise and weight management after 18 months, but did not change clinical markers such as blood pressure, cholesterol or BMI, nor health care spending or absenteeism.⁴ The behaviours were right. Nothing was dosed.
How My Heart Fitness puts "dosing" of lifestyle medicine into practice
Here is where the clinical argument becomes specific.
The key concept is exercise dose: the type, intensity, frequency and duration of activity, matched to a person's starting point and adjusted as they change. Two people can receive the same advice to "exercise more" and be receiving very different interventions.
Consider two 62-year-olds. One is recovering from a heart attack and has not exercised in years. The other has high blood pressure, walks daily and wants to do more. For the first, a safe starting dose may be short, low-intensity sessions that build gradually under clinical oversight. For the second, the right dose may include higher-intensity intervals and strength training. The recommendation is the same. The prescription, the tracking and the integration with the rest of their care are not.
My Heart Fitness was designed by a cardiologist around this principle. Its approach starts from a measured baseline, translates the evidence on exercise into a personalized dose, and follows change over time so that progress is visible to the person and to their care team. Physical activity is the anchor, because it is the pillar that can be measured and dosed most precisely today, with sleep, stress and nutrition treated as part of the same plan.
This is the gap that neither general wellness programs nor traditional clinical care fully occupy: the space between advice and infrastructure, between a recommendation and a measured, dosed clinical behaviour.
What lifestyle medicine means for employers and health plans
For employers and payers, the question is not how many people engage. It is who engages, and what changes when they do.
Chronic disease is where health spending concentrates. In the United States, the CDC reports that 90% of the nation's $5.3 trillion in annual health care spending goes to people with chronic and mental health conditions (CDC). Cardiovascular disease is among the most costly of these.
Some of the benefit to employers may come from the clinic, not the workplace. If physicians prescribed lifestyle the way they prescribe medication, patients may be more likely to adhere. Since many patients are also employees, that adherence would naturally spill over into the workforce.
What needs to change is the move from "engagement" to "who we must engage," and the economic impact of converting those people. Many wellness offerings are priced per member per month. That model is reasonable, but it treats every engaged member the same. If an engaged member already gets enough activity, or is not at risk because of their age or risk-factor profile, engaging them may not produce meaningful savings for the payer.
Sedentary employees are different, and the cost of inactivity is large. A CDC-led analysis found that inadequate physical activity was associated with 11.1% of U.S. health care spending, about $117 billion a year.⁷ Inactive adults spent roughly $1,300 more per person each year on health care than active adults. A 2025 update put the share at 12.6%, or about $192 billion a year in 2019 dollars.⁸
That changes how a program should be judged. Each 1% of a workforce converted from sedentary to meeting minimum recommended activity (150 minutes of moderate activity a week) could produce substantial savings through fewer avoidable hospitalizations, lower drug costs, and less absenteeism and disability from preventable cardiac events.
As a rough illustration, if the per-person cost gap held, converting 100 inactive employees would be associated with about $130,000 a year in health care spending alone, before counting lost work time.
The value of lifestyle medicine to an employer is not participation. It is conversion, in the people where conversion matters most.
Frequently asked questions
Can lifestyle medicine replace medication? Sometimes it can reduce the need for medication, but it is not a substitute for treatment a clinician has prescribed. Lifestyle medicine works alongside medication, and for many people with heart disease, high blood pressure or high cholesterol the two together work best. Any change to a medication should be made with your care team.
Who practices lifestyle medicine? Physicians, nurse practitioners, dietitians, exercise professionals, psychologists and other clinicians can all practise lifestyle medicine. Since 2017, more than 10,000 physicians and health professionals in 96 countries have been certified by the American Board of Lifestyle Medicine (ACLM).
Is lifestyle medicine available in Canada? Yes. Canadian physicians and health professionals can be certified in lifestyle medicine, and many of its tools, such as cardiac rehabilitation, dietitian care and exercise programs, are already part of Canadian health care. It is not yet a separately recognized specialty in Canada, so the approach varies by clinician and program.
How is lifestyle medicine different from a wellness program? The two often cover the same topics, and the labels are used loosely. The more useful distinction is dose: whether a behaviour is measured, prescribed in a specific amount, adjusted over time and linked to an expected effect on outcomes, the way a medication is. Most wellness programs, and many lifestyle programs, are not yet built that way.
Can every pillar of lifestyle medicine be measured? Not equally. Physical activity can be measured objectively through cardiorespiratory fitness, and smoking's link to heart disease is well quantified. Stress is harder to measure beyond self-report, and its link to outcomes is harder to put a number on.
What is exercise dose? Exercise dose is the type, intensity, frequency and duration of physical activity prescribed for a specific person. Like a medication dose, it depends on a person's condition, fitness and goals, and it should be adjusted as they progress.
Why should employers care about lifestyle medicine? Inadequate physical activity is associated with about 11% of U.S. health care spending, and inactive adults cost roughly $1,300 more per person each year in health care. The largest returns come from converting sedentary, at-risk employees to recommended activity levels, not from engaging people who are already active or at low risk.
References
- Khera AV, Emdin CA, Drake I, et al. Genetic risk, adherence to a healthy lifestyle, and coronary disease. N Engl J Med. 2016;375(24):2349-2358.
- Lloyd-Jones DM, Allen NB, Anderson CAM, et al. Life's Essential 8: updating and enhancing the American Heart Association's construct of cardiovascular health: a presidential advisory from the American Heart Association. Circulation. 2022;146(5):e18-e43.
- Cené CW, Beckie TM, Sims M, et al. Effects of objective and perceived social isolation on cardiovascular and brain health: a scientific statement from the American Heart Association. J Am Heart Assoc. 2022;11(16):e026493.
- Song Z, Baicker K. Effect of a workplace wellness program on employee health and economic outcomes: a randomized clinical trial. JAMA. 2019;321(15):1491-1501.
- Kokkinos P, Faselis C, Samuel IBH, et al. Cardiorespiratory fitness and mortality risk across the spectra of age, race, and sex. J Am Coll Cardiol. 2022;80(6):598-609.
- Alter DA. From insight to infrastructure: managing cardiorespiratory fitness. J Am Coll Cardiol. 2026. doi:10.1016/j.jacc.2026.03.053
- Carlson SA, Fulton JE, Pratt M, Yang Z, Adams EK. Inadequate physical activity and health care expenditures in the United States. Prog Cardiovasc Dis. 2015;57(4):315-323.
- Updated estimate of health care expenditures associated with inadequate physical activity among U.S. adults. Am J Health Promot. 2025. doi:10.1177/08901171251357128