The most effective things you can do for your heart come down to eight measurable factors: eating well, staying active, avoiding nicotine, sleeping enough, maintaining a healthy weight, and keeping your blood pressure, blood sugar, and cholesterol in check. The American Heart Association formalized these as “Life’s Essential 8,” grouping them into four health behaviors you control daily and four health factors you can track with numbers. Here’s what each one looks like in practice.
What to Eat for a Healthier Heart
Two eating patterns stand out in heart disease prevention: the Mediterranean diet and the DASH diet. Both emphasize fruits, vegetables, whole grains, nuts, and unsaturated fats while limiting red and processed meats. The Mediterranean pattern also prioritizes fish, olive oil, and moderate portions of nuts. DASH goes further on sodium restriction and encourages low-fat dairy while discouraging sugar-sweetened beverages. You don’t need to follow either one rigidly. The overlap between them is the real takeaway: more plants, more whole foods, less processed meat, less saturated fat.
Fiber deserves special attention. Soluble fiber, found in oats, beans, lentils, and many fruits, forms a gel in your digestive tract that slows the absorption of sugar and fats. Gut bacteria also ferment fiber into compounds that help reduce circulating cholesterol. Each additional 7 grams of fiber per day is associated with a 9% lower risk of coronary heart disease. Most adults fall well short of the 25 to 30 grams recommended daily, so even modest increases help.
Omega-3 fats from fatty fish (salmon, mackerel, sardines) reduce inflammation, lower triglycerides, and improve blood vessel function. Eating roughly 8 ounces of seafood per week provides about 250 mg of EPA and DHA daily, enough to reduce the risk of cardiac death. Higher intakes of 1 to 2 grams per day offer additional protection. In one major trial, a high-dose purified fish oil reduced serious cardiovascular events by 25% in people already on cholesterol-lowering medication.
Sodium and Potassium: The Ratio Matters
Most guidelines recommend keeping sodium below 2,300 mg per day, with the World Health Organization suggesting under 2,000 mg. But potassium intake matters just as much. Potassium helps your body excrete sodium and relaxes blood vessel walls, and the ratio between the two minerals may be more predictive of heart risk than either one alone. The optimal daily potassium intake appears to be around 3,500 mg, which you can reach by eating potatoes, bananas, beans, leafy greens, and avocados regularly.
Interestingly, research on sodium shows a U-shaped curve: both very low and very high intakes are associated with increased mortality, with the lowest-risk point around 3,100 mg per day. For older adults, that inflection point is slightly higher. The practical lesson is that drastically slashing sodium isn’t necessarily better than moderate reduction, especially if your potassium intake is also low.
How Much Exercise Your Heart Needs
The standard recommendation is at least 150 minutes per week of moderate-intensity aerobic activity (brisk walking, cycling, swimming) or 75 minutes of vigorous activity (running, high-intensity interval training). That works out to about 22 minutes a day of moderate movement. The American Heart Association also recommends strength training at least twice a week, targeting each major muscle group with at least two days of rest between sessions.
You don’t need to hit these numbers all at once. Shorter bouts of activity throughout the day count. What matters is consistency over weeks and months. Exercise lowers blood pressure, improves cholesterol ratios, helps regulate blood sugar, reduces stress hormones, and strengthens the heart muscle itself. Few interventions touch as many risk factors simultaneously.
Sleep Is a Cardiovascular Risk Factor
Sleep was added to the AHA’s cardiovascular health framework because the evidence became impossible to ignore. Adults who sleep fewer than 6 hours a night have 35% lower odds of ideal cardiovascular health compared to those sleeping 7 to 9 hours. Sleeping too long (9 or more hours) also carries risk, with 28% lower odds of ideal heart health. The sweet spot is 7 to just under 9 hours.
Short sleep disrupts appetite hormones, impairs glucose tolerance, raises blood pressure, and promotes chronic inflammation. Even sleeping 6 to 7 hours, which many people consider adequate, is associated with measurably lower cardiovascular health scores compared to 7 to 9 hours. If you’re consistently undersleeping, improving your sleep may do more for your heart than adding another supplement.
Know Your Numbers
Four measurable values tell you where your heart health stands right now.
Blood pressure should be below 120/80 mmHg. Readings of 120 to 129 systolic (the top number) with a normal bottom number are considered elevated. Stage 1 hypertension starts at 130/80, and stage 2 begins at 140/90. Blood pressure often rises silently, which is why regular checks matter even when you feel fine.
Cholesterol targets for most adults are total cholesterol below 200 mg/dL, LDL (“bad” cholesterol) below 100 mg/dL, and HDL (“good” cholesterol) at or above 60 mg/dL. For women, HDL below 50 is considered low; for men, below 40. LDL is the number most strongly linked to plaque buildup in arteries.
Blood sugar reflects your risk of developing diabetes, which roughly doubles the risk of heart disease. Fasting glucose below 100 mg/dL is normal. Values between 100 and 125 indicate prediabetes, a stage where lifestyle changes are particularly effective.
Body weight matters because excess body fat, especially around the midsection, raises blood pressure, worsens cholesterol, and promotes insulin resistance. Even modest weight loss of 5 to 10% of body weight can meaningfully improve all of these markers.
Stress and Your Arteries
Chronic stress raises cortisol levels, which in turn increase blood cholesterol, triglycerides, blood sugar, and blood pressure. Over time, these changes promote plaque buildup in the arteries. Stress also makes blood stickier and more prone to clotting, raising the risk of stroke. Even minor episodes of stress can temporarily reduce blood flow to the heart muscle.
The specific method of stress management matters less than doing it consistently. Regular physical activity, adequate sleep, social connection, and structured relaxation practices (meditation, deep breathing, yoga) all lower cortisol. Because stress worsens nearly every other risk factor on this list, managing it has a compounding effect on heart health.
Nicotine and Alcohol
Avoiding nicotine in all forms, not just cigarettes but vapes, chewing tobacco, and secondhand smoke, is one of the single most impactful things you can do. Nicotine raises blood pressure, accelerates heart rate, narrows arteries, and makes blood more likely to clot. The cardiovascular benefits of quitting begin within hours and continue building for years.
Alcohol’s relationship to heart health has shifted in recent years. Earlier research suggested moderate drinking might be protective, but stronger recent studies show that even moderate use (one to two drinks per day) does not lower the risk of death compared to not drinking at all. In fact, any level of alcohol consumption may slightly increase the risk of heart disease and certain cancers. If you don’t drink, there’s no cardiovascular reason to start. If you do, keeping intake to one drink or fewer per day for women and two or fewer for men limits the added risk.