Lowering diastolic blood pressure, the bottom number in your reading, is achievable through a combination of dietary changes, exercise, and lifestyle adjustments. A diastolic reading of 80 mmHg or higher now qualifies as Stage 1 hypertension under the 2025 AHA/ACC guidelines, while anything below 80 is considered normal. The good news: several well-studied strategies can bring that number down by 2 to 7 mmHg each, and combining them produces even larger drops.
What Diastolic Pressure Actually Reflects
Your diastolic number measures the pressure in your arteries between heartbeats, when your heart is resting and refilling with blood. In adults under 50, a high diastolic reading primarily reflects increased resistance in the smaller blood vessels throughout your body. Your arteries are staying tighter than they should be, even during that rest phase. This is why lifestyle factors that relax blood vessels or reduce fluid volume, like exercise, potassium intake, and cutting sodium, tend to work well for diastolic pressure specifically.
Some people have a high diastolic number while their systolic (top) number stays normal. This pattern, called isolated diastolic hypertension, accounts for up to 20% of hypertension cases and is most common in younger adults. The biggest risk factors are carrying excess weight, sleep apnea, and smoking.
Adjust Your Diet With the DASH Approach
The DASH eating plan is the most extensively tested dietary strategy for blood pressure. In a landmark trial of 459 adults, participants who followed the DASH diet for eight weeks had the greatest reductions in blood pressure compared to those eating a typical American diet or simply adding more fruits and vegetables. The diet emphasizes fruits, vegetables, whole grains, lean protein, and low-fat dairy while limiting saturated fat and added sugars.
A follow-up study, DASH-Sodium, found that combining the DASH diet with low sodium intake (about 1,500 mg per day, roughly half a teaspoon of salt) lowered blood pressure more than either change alone. Blood pressure dropped further with each additional reduction in sodium. Later research from the OmniHeart trial showed that swapping about 10% of daily calories from carbohydrates to either protein or unsaturated fat (like olive oil, nuts, or avocado) improved results beyond the original DASH plan.
Potassium plays a key supporting role. The World Health Organization recommends at least 3,510 mg of potassium per day for adults, which most people fall short of. Good sources include bananas, potatoes, spinach, beans, and yogurt. Potassium helps your body excrete sodium and relaxes blood vessel walls, both of which lower the pressure your arteries experience between beats.
Exercise for 30 Minutes Most Days
Regular aerobic exercise lowers diastolic blood pressure by an average of 3 to 7.5 mmHg in people with hypertension. One 10-week trial found that moderate-intensity aerobic training three times per week reduced diastolic pressure by 6.3 mmHg in patients with mild to moderate high blood pressure. That’s a meaningful drop from exercise alone.
The target is at least 150 minutes of moderate-intensity activity per week: brisk walking, cycling, swimming, or anything that gets your heart rate up without leaving you gasping. Interestingly, the minimum effective dose appears to be 30 to 60 minutes per week, and the diastolic benefit plateaus around 90 to 120 minutes weekly. So you don’t need to train like an athlete. Consistency matters more than intensity.
Lose Weight if You’re Carrying Extra
Weight loss has a direct, measurable relationship with diastolic pressure. A meta-analysis published by the American Heart Association found that diastolic blood pressure drops by about 0.9 mmHg for every kilogram (roughly 2.2 pounds) lost. That means losing 10 pounds could lower your diastolic reading by about 4 mmHg, and losing 20 pounds by roughly 8 mmHg. For people whose high diastolic pressure is linked to excess weight, this is one of the most impactful single changes available.
You don’t need to reach an ideal body weight to see results. The relationship is linear: every kilogram lost contributes nearly the same reduction, so even modest weight loss helps.
Cut Back on Alcohol
Reducing alcohol intake lowers diastolic pressure by about 2 mmHg on average, based on a meta-analysis of 14 randomized controlled trials. That number climbs the more you cut. Researchers found a clear dose-response relationship: the greater the reduction in drinking, the greater the drop in both systolic and diastolic pressure. This effect held across studies lasting four weeks or longer.
If you drink regularly, scaling back to one drink per day or less is a reasonable target. If you’re already a light or occasional drinker, this lever probably won’t move the needle much for you.
Combining Strategies for the Biggest Impact
None of these changes works in isolation as well as they work together. The PREMIER trial demonstrated that participants who received lifestyle counseling and followed the DASH diet simultaneously had the greatest blood pressure reductions. Here’s a realistic picture of what stacking these strategies could look like:
- DASH diet with sodium reduction: typically 4 to 8 mmHg diastolic reduction
- Regular aerobic exercise: 3 to 7.5 mmHg
- Weight loss of 10 to 20 pounds: 4 to 8 mmHg
- Alcohol reduction: about 2 mmHg
These numbers don’t simply add up (the effects overlap), but combining three or four of them can realistically bring a diastolic reading from the low 90s back into the normal range for many people.
When Lifestyle Changes Aren’t Enough
Stage 1 hypertension (diastolic 80 to 89 mmHg) is often managed with lifestyle changes first, especially if you don’t have other cardiovascular risk factors. Stage 2 (diastolic 90 mmHg or higher) more commonly requires medication alongside those changes. Isolated diastolic hypertension is diagnosed when your bottom number stays at 80 or above across two or more office visits while your top number remains below 130.
If your diastolic pressure stays elevated after several months of consistent lifestyle changes, medication becomes a reasonable next step. Several classes of blood pressure drugs effectively lower diastolic pressure, and your doctor can select one based on your age, other health conditions, and how your body responds. Younger adults with high diastolic pressure should also be screened for sleep apnea, since treating it can lower blood pressure independently of other interventions.