Lowering your diastolic blood pressure, the bottom number in a blood pressure reading, comes down to a combination of consistent lifestyle changes. A normal diastolic reading is below 80 mmHg. Stage 1 hypertension starts at 80 to 89 mmHg, and stage 2 begins at 90 or above. The good news is that several proven strategies can bring that number down, and most of them work within weeks.
Why Diastolic Pressure Matters on Its Own
Your diastolic reading reflects what’s happening in your blood vessels between heartbeats, when your heart is relaxing and refilling. While systolic pressure (the top number) is driven largely by how stiff your major arteries are, diastolic pressure is shaped by the resistance in your smaller blood vessels. When those vessels are chronically tight or inflexible, diastolic pressure stays elevated even if your systolic number looks fine.
This pattern, called isolated diastolic hypertension, is more common in younger and middle-aged adults. It may not cause noticeable symptoms, but it raises your lifetime risk of heart attack, congestive heart failure, and death from cardiovascular disease. Those risks are highest for women and people under 60. The 2025 AHA/ACC guidelines now recommend starting medication if your diastolic reading stays at or above 80 mmHg after three to six months of lifestyle changes, and immediately if it’s 90 or higher.
Cut Back on Sodium
Reducing salt intake is one of the most reliable ways to lower diastolic pressure. A meta-analysis published by the World Health Organization found that a modest reduction in daily salt, roughly cutting intake from about 9 to 12 grams per day down to 5 to 6 grams, lowered diastolic pressure by about 2.8 mmHg in people with hypertension and about 1 mmHg in people with normal blood pressure. That may sound small, but at a population level those reductions meaningfully cut cardiovascular risk.
Most dietary sodium comes from processed and restaurant foods, not the salt shaker. Reading nutrition labels, choosing low-sodium versions of canned goods and condiments, and cooking more meals at home are the most practical places to start. The DASH eating plan, developed by the National Heart, Lung, and Blood Institute, pairs sodium reduction with higher intake of fruits, vegetables, whole grains, and lean protein. Trials have tested versions of DASH at 1,500 mg, 2,300 mg, and 3,300 mg of sodium per day, with lower sodium consistently producing better blood pressure results.
Lose Weight, Even a Little
If you’re carrying extra weight, even modest losses make a measurable difference. A meta-analysis of randomized controlled trials in the journal Hypertension found that for every kilogram (about 2.2 pounds) of weight lost, diastolic blood pressure dropped by roughly 0.9 mmHg. Losing 5 kilograms, or about 11 pounds, could mean a diastolic drop of nearly 5 points. The mechanism is straightforward: less body mass means less work for your cardiovascular system and less resistance in your blood vessels.
You don’t need a dramatic diet to get there. A sustained calorie deficit of a few hundred calories per day, combined with the exercise strategies below, produces the kind of gradual weight loss that tends to stick.
Exercise at Least Three Days a Week
Both aerobic exercise and strength training lower diastolic blood pressure. A large meta-analysis in the British Journal of Sports Medicine found that aerobic training reduced diastolic pressure by about 2.5 mmHg on average, while resistance training reduced it by about 3 mmHg. Those effects show up with regular sessions over several weeks.
Interestingly, the data suggest that training three times per week may be just as effective as five or more sessions for lowering blood pressure. The key is consistency over intensity. Brisk walking, cycling, swimming, or moderate weightlifting all qualify. If you’re not currently active, starting with 30 minutes of moderate aerobic activity three days a week is a reasonable and evidence-backed target.
One emerging approach involves isometric exercises, where you hold a static muscle contraction (like a wall sit or a plank) rather than moving through a range of motion. Protocols typically use four sets of two-minute holds with rest intervals, performed three times a week. While research on these exercises is still developing, early results are promising for blood pressure reduction.
Reduce Alcohol Intake
Alcohol has a direct, dose-dependent effect on blood pressure. Heavy drinkers who cut back to moderate levels, defined as up to one drink a day for women and up to two for men, can expect a diastolic drop of about 4 mmHg. That’s comparable to what some medications achieve. If you’re drinking above those thresholds regularly, reducing your intake is one of the faster lifestyle changes you can make, with blood pressure improvements often visible within days to weeks.
Get Enough Potassium and Magnesium
Potassium helps your body flush out sodium and relaxes blood vessel walls, both of which lower diastolic pressure. Most people don’t get enough. The best sources are bananas, potatoes, leafy greens, beans, and yogurt. Clinical trials have used supplemental potassium at doses around 60 mmol per day (roughly 2,300 mg of elemental potassium), though reaching adequate levels through food is generally preferred.
Magnesium plays a supporting role in blood vessel relaxation. Studies have tested supplements at around 360 mg of magnesium per day. Foods rich in magnesium include nuts, seeds, dark chocolate, and whole grains. If your diet is low in fruits, vegetables, and whole grains, you’re likely not getting enough of either mineral, and correcting that gap can contribute to lower readings.
Stress Reduction Has Limits
Chronic stress does raise blood pressure temporarily through hormonal responses that tighten blood vessels. However, the evidence for structured stress-reduction programs is mixed when it comes to diastolic pressure specifically. A randomized clinical trial published in the Journal of the American Heart Association tested an adapted mindfulness training program against a control group and found no significant difference in diastolic blood pressure at either three or six months.
That doesn’t mean stress management is worthless. Acute stress clearly spikes blood pressure, and managing it may help you sleep better, drink less, and stick to other healthy habits. But if you’re choosing between meditation and a 30-minute walk, the walk has stronger evidence behind it for actually lowering your diastolic number.
When Lifestyle Changes Aren’t Enough
If your diastolic reading stays at 80 mmHg or above after three to six months of consistent lifestyle changes, current guidelines recommend starting blood pressure medication. If it’s at 90 or above, medication is recommended right away regardless of other risk factors. The overall treatment goal is below 130/80 mmHg.
No specific class of medication has been proven to target diastolic pressure independently of systolic. Any drug that lowers diastolic pressure tends to lower systolic pressure too. Your prescriber will choose based on your overall cardiovascular profile, other health conditions, and how you respond. The important thing to understand is that isolated diastolic hypertension is a real cardiovascular risk factor, not something to brush off because the top number looks fine.
Putting It All Together
The most effective approach stacks multiple changes. Cutting sodium by a few grams a day, losing 5 to 10 kilograms, exercising three or more days a week, and moderating alcohol could collectively lower your diastolic pressure by 10 mmHg or more. That’s enough to move many people from stage 1 hypertension back into the normal range without medication. These changes also reduce your risk of heart disease, stroke, and kidney problems through mechanisms that go well beyond blood pressure alone.
Track your progress with a validated home blood pressure monitor, taken at the same time each day after sitting quietly for five minutes. Two readings one minute apart, averaged together, give you the most accurate picture of where you stand.