Lowering diastolic blood pressure, the bottom number in your reading, comes down to a handful of proven strategies: regular exercise, maintaining a healthy weight, eating more potassium-rich foods, and cutting back on alcohol if you drink heavily. A normal diastolic reading is below 80 mm Hg. Stage 1 hypertension starts at 80 to 89, and stage 2 begins at 90 or higher.
Unlike systolic pressure, which rises steadily with age, diastolic pressure often peaks in midlife and can be stubbornly resistant to some interventions that work well for systolic numbers. The strategies below have the strongest evidence for bringing diastolic pressure down specifically.
Exercise Is the Most Effective Single Change
Physical activity lowers diastolic pressure more reliably than almost any other lifestyle change, but the type of exercise matters more than you might expect. A large meta-analysis published in the British Journal of Sports Medicine compared every major category of exercise and found that isometric training, where you hold a static position against resistance, outperformed traditional cardio for blood pressure reduction.
Isometric exercises like wall sits produced the largest diastolic drop: about 5.3 mm Hg on average. Isometric leg extensions and handgrip exercises also lowered diastolic pressure, by roughly 4.2 and 3.5 mm Hg respectively. These exercises involve holding a contraction for two minutes or so, resting briefly, then repeating for a few rounds. A typical protocol is four sets of two-minute wall sits with one to two minutes of rest between each, done three times a week.
Aerobic exercise (walking, cycling, swimming) still works. It lowered diastolic pressure by about 2.5 mm Hg across studies. That’s a meaningful reduction, and aerobic exercise carries so many other health benefits that it remains a cornerstone recommendation. But if your diastolic number is specifically what concerns you, adding isometric holds to your routine gives you an extra edge.
Lose Weight, Even a Little
Weight loss has a remarkably predictable effect on diastolic pressure. A meta-analysis of randomized controlled trials found that for every kilogram (about 2.2 pounds) of body weight lost, diastolic pressure drops by roughly 0.9 mm Hg. That means losing 10 pounds could lower your diastolic reading by about 4 mm Hg.
This effect holds regardless of how the weight is lost, whether through calorie reduction, increased activity, or both. The key takeaway: you don’t need dramatic weight loss to see results. Even modest reductions of 5 to 10 percent of body weight produce clinically meaningful improvements in blood pressure.
Eat More Potassium-Rich Foods
Potassium helps your kidneys flush out excess sodium, which relaxes blood vessel walls and lowers pressure. A dose-response meta-analysis in the Journal of the American Heart Association found that increasing potassium intake lowered diastolic pressure by about 2.3 mm Hg at moderate supplementation levels. The overall pooled reduction across trials was 2.4 mm Hg for diastolic pressure.
The optimal potassium intake identified in the research was roughly 3,500 to 5,100 mg per day. Most adults get far less than that. Interestingly, the relationship between potassium and blood pressure isn’t linear: very high supplemental doses didn’t produce additional benefits and may have slightly blunted the effect. Getting your potassium from food rather than supplements is the safer and more effective approach.
The richest food sources include potatoes (with skin), bananas, spinach, white beans, avocados, sweet potatoes, and yogurt. A single baked potato with skin provides around 900 mg. A cup of cooked spinach has about 840 mg. Building meals around these foods makes hitting the target realistic without supplements.
Cut Back on Alcohol
If you drink heavily, reducing your intake is one of the fastest ways to lower diastolic pressure. A systematic review in The Lancet Public Health found that people who consumed six or more drinks per day and cut their intake by roughly half saw their diastolic pressure drop by about 4 mm Hg. Their systolic pressure dropped by 5.5 mm Hg.
The effect was strongest in the heaviest drinkers, which makes sense: alcohol raises blood pressure through multiple pathways, including increasing stress hormones, stiffening blood vessels, and disrupting sleep. If you drink moderately (one drink per day or less), reducing further may still help, but the measurable impact will be smaller.
Reduce Sodium Intake
Sodium restriction is standard advice for blood pressure, and it applies to the diastolic number too. Current guidelines recommend staying below 2,300 mg of sodium per day, with an ideal target closer to 1,500 mg for people with hypertension. Most Americans consume over 3,400 mg daily, so there’s usually significant room to cut back.
The practical challenge is that roughly 70 percent of sodium in the average diet comes from processed and restaurant foods, not the salt shaker. Bread, deli meats, canned soups, frozen meals, and condiments are the biggest contributors. Cooking more meals at home using whole ingredients is the single most effective way to reduce sodium without obsessively tracking every milligram. When buying packaged foods, compare labels and choose lower-sodium versions of the items you eat most often.
Why Diastolic Pressure Can Be Stubborn
Diastolic pressure reflects the resistance in your blood vessels between heartbeats, when the heart is relaxing and refilling. It’s influenced heavily by how stiff or flexible your smaller arteries are. This is why some people find their systolic number responds to treatment while their diastolic barely budges: the underlying issue is arterial stiffness rather than the force of heart contractions.
Exercise, particularly isometric training, appears to improve this arterial flexibility over time, which may explain why it’s so effective for diastolic pressure specifically. Weight loss reduces the total volume of blood vessels your heart needs to supply, lowering the baseline resistance. Potassium and sodium both influence fluid balance, which directly affects how much pressure is maintained between beats.
Combining Strategies for the Biggest Drop
These interventions stack. Someone who adds isometric exercise (potentially 4 to 5 mm Hg reduction), loses 10 pounds (about 4 mm Hg), increases potassium intake (about 2 mm Hg), and cuts heavy drinking in half (about 4 mm Hg) could see a combined diastolic reduction in the range of 10 to 15 mm Hg. That’s enough to move many people from stage 1 hypertension back into the normal range.
The reductions don’t always add up perfectly in practice because some mechanisms overlap, but the general principle holds: layering multiple lifestyle changes produces significantly larger results than relying on any single one. Start with the change that feels most achievable for you and build from there. Blood pressure improvements from exercise and weight loss typically become measurable within four to six weeks of consistent effort.