You can increase blood flow through a combination of regular exercise, dietary changes, heat exposure, and lifestyle adjustments that work together to keep your blood vessels flexible and your circulation strong. Most of these strategies work by boosting your body’s production of nitric oxide, a molecule released by the cells lining your blood vessels that signals the surrounding muscle to relax, widening the vessel and letting more blood pass through.
Why Nitric Oxide Matters
Nearly every effective strategy for improving circulation traces back to nitric oxide. When blood flows across the inner lining of your arteries, the physical force triggers cells to produce this molecule. Nitric oxide then activates a chain reaction in the vessel wall that causes smooth muscle to relax, opening the artery wider. Exercise, certain foods, and even heat exposure all amplify this process. As you age or develop conditions like high blood pressure, your body produces less nitric oxide on its own, which is why actively supporting it becomes more important over time.
Exercise Is the Strongest Signal
Physical activity is the single most effective way to improve blood flow, both during a workout and in the hours afterward. When your heart pumps harder, blood moves faster across vessel walls, generating the shear stress that triggers nitric oxide release. Over weeks and months, this repeated stimulus trains your blood vessels to stay more flexible at rest too.
Current guidelines recommend at least 150 minutes of moderate-intensity aerobic activity per week, or 75 minutes of vigorous-intensity activity. Moderate intensity means your heart rate sits at roughly 50% to 70% of your maximum (a brisk walk where you can talk but not sing). Vigorous intensity pushes you to 70% to 85% of your max (jogging, cycling uphill, swimming laps). For additional cardiovascular benefit, working up to 300 minutes per week of moderate activity shows even greater improvements.
You don’t need long, unbroken sessions. Interval training, which alternates short bursts of harder effort (20 seconds to 4 minutes) with easier recovery periods, is well tolerated and effective. Walking for 30 minutes five days a week is a perfectly good starting point. Adding two days of strength training each week also helps: contracting muscles against resistance forces blood into capillary beds that might otherwise stay underused, and building muscle mass increases the total vascular network your body maintains.
Nitrate-Rich Foods
Dietary nitrates offer one of the most well-studied food-based routes to better circulation. When you eat nitrate-rich vegetables, bacteria on your tongue convert the nitrate into nitrite, which your body then transforms into nitric oxide. Beetroot juice is the most researched source, but leafy greens like spinach, arugula, and celery are also high in nitrates.
The effective dose in research is about 350 to 500 mg of nitrate, roughly the amount in a single concentrated beetroot juice shot (around 70 ml). Taking more than about 600 to 750 mg in one sitting doesn’t appear to add further benefit. For a sustained effect, consuming this amount daily for several consecutive days produces the most consistent results. The peak circulatory benefit arrives about two to three hours after you drink or eat the nitrate source, which is why athletes often time it before training.
One practical note: antibacterial mouthwash can kill the tongue bacteria responsible for the first conversion step, blunting the effect of dietary nitrates. If you’re eating beets specifically for circulation, regular mouthwash use may work against you.
Supplements That Support Circulation
Two amino acids are commonly sold as circulation boosters: L-arginine and L-citrulline. Both serve as raw materials your body uses to manufacture nitric oxide, but they behave differently once absorbed.
L-citrulline is actually more effective at raising blood levels of L-arginine than L-arginine supplements themselves, because L-citrulline bypasses liver metabolism and gets converted to L-arginine in the kidneys. Studies using 2.4 to 6 grams per day of L-citrulline over 7 to 16 days showed increased nitric oxide production and improved markers of physical performance. By contrast, L-arginine at doses up to 6 grams did not reliably increase nitric oxide synthesis or improve performance in recreationally active people.
Combining the two at lower doses (around 1.2 grams of each) appears to raise nitric oxide availability more effectively than either one alone, likely because they reinforce each other at different points in the production pathway. If you’re choosing just one supplement for circulatory support, L-citrulline has the stronger evidence behind it.
Heat Exposure
Sitting in a sauna, soaking in a hot bath, or using a hot tub causes your blood vessels to dilate as your body works to shed excess heat. Your heart rate can climb from its resting rate up to 120 to 150 beats per minute during a typical sauna session, mimicking the cardiovascular demand of moderate exercise. Blood rushes toward the skin’s surface, and peripheral circulation increases substantially.
Regular sauna use has been linked to long-term cardiovascular benefits in large observational studies. Even a warm bath at home produces a milder version of the same response. If you’re mostly sedentary or recovering from an injury that limits exercise, heat therapy can serve as a partial stand-in while you build back activity levels.
Hydration and Blood Viscosity
Your blood’s thickness directly affects how easily it flows. When you’re dehydrated, blood becomes more viscous, and red blood cells stiffen, making it harder for them to squeeze through small capillaries. Research on exercising adults found that losing just 1.5% to 2% of body weight through sweat (about 1 to 1.5 kg for most people) was enough to measurably increase blood viscosity.
Staying hydrated reversed this effect. In well-hydrated conditions, blood viscosity dropped about 13% below baseline during recovery from exercise, and red blood cells became more flexible. You don’t need to overhydrate. Drinking enough water throughout the day so that your urine stays a pale yellow is a reliable practical target.
Quit Smoking
Smoking constricts blood vessels and damages the endothelial cells responsible for producing nitric oxide. The recovery timeline after quitting is faster than most people expect. Within minutes of your last cigarette, your heart rate begins to drop. Within 24 hours to a few days, carbon monoxide levels in your blood return to normal, freeing up red blood cells to carry oxygen more efficiently. Within one to two years, your risk of heart attack drops dramatically. After 15 years, your coronary heart disease risk approaches that of someone who never smoked.
If you currently smoke, quitting will do more for your circulation than any supplement or dietary change. The vascular damage from smoking undermines every other strategy on this list.
Compression Garments
Compression socks and stockings work mechanically: they apply graduated pressure to your legs, with the strongest squeeze at the ankle, pushing blood upward against gravity. Medical-grade compression typically ranges from 20 to 40 mmHg of pressure. These are particularly useful if you sit or stand for long periods, travel frequently, or have conditions that cause blood to pool in your lower legs.
Over-the-counter athletic compression garments generally provide lighter pressure. They can help during and after exercise but won’t match the circulatory effect of properly fitted medical-grade stockings. For everyday use, knee-high or waist-high versions rated at 20 to 30 mmHg are a common starting point.
Signs of Poor Circulation to Watch For
Some symptoms suggest blood flow problems that go beyond what lifestyle changes can fix. Cramping or pain in your legs while walking that goes away when you stop is a hallmark of peripheral artery disease, a condition where plaque narrows the arteries supplying your legs. Other warning signs include wounds on your feet or legs that heal unusually slowly, skin that looks pale or feels cool to the touch, swelling, and redness.
Doctors test for this condition by comparing blood pressure in your ankle to blood pressure in your arm, producing a ratio called the ankle-brachial index. A healthy result is 1.00 or higher. A result below 0.90 at rest suggests narrowed arteries, and below 0.40 indicates severe disease. If you notice leg pain with walking, persistent coldness in one foot, or slow-healing sores, these warrant medical evaluation rather than home remedies alone.