A blood pressure of 109/74 is a good reading. It falls squarely in the “normal” category, which the American Heart Association and American College of Cardiology define as a systolic (top number) below 120 and a diastolic (bottom number) below 80. No lifestyle changes or medical follow-up are needed based on this number alone.
What 109 and 74 Actually Mean
The top number, 109, measures the pressure inside your arteries when your heart contracts and pushes blood out. The bottom number, 74, measures the pressure between beats, when your heart is relaxed. Both numbers matter, and in your case, both sit comfortably within the normal range with room to spare before reaching the next category (elevated blood pressure starts at 120 systolic).
The 2025 update to the AHA/ACC hypertension guidelines reaffirmed that the ideal treatment goal for most adults is below 130/80, with encouragement to get below 120/80. At 109/74, you’re already there. These guidelines also no longer set different blood pressure targets based on age, so the same normal range applies whether you’re 30 or 75.
How Close Is This to Low Blood Pressure?
Some people see a systolic number around 110 and wonder if it’s too low. It’s not. Low blood pressure, or hypotension, is generally defined as a reading below 90/60. Your reading of 109/74 is well above that threshold.
That said, blood pressure that’s technically “normal” on paper can still cause symptoms if it drops suddenly. A decline of just 20 points in systolic pressure, say from 110 down to 90, can cause dizziness or fainting. If you regularly feel lightheaded, fatigued, or have blurred vision when standing up, those symptoms are worth mentioning to your doctor regardless of what the numbers say. But if you feel fine at 109/74, your body is handling that pressure well.
One Reading Isn’t the Full Picture
Blood pressure fluctuates throughout the day based on what you’ve eaten, how stressed you are, whether you’ve exercised recently, and even how you’re sitting. A single reading is a snapshot, not a diagnosis. To get a reliable picture, measure at the same time of day over several days.
Accuracy also depends on technique. The CDC recommends avoiding food, caffeine, alcohol, and exercise for 30 minutes before measuring. Sit with your back supported and both feet flat on the floor for at least five minutes beforehand. Rest your arm on a table at chest height, keep the cuff against bare skin, don’t cross your legs, and stay silent during the reading. Crossing your legs or letting your arm hang at your side can artificially inflate the numbers.
Keeping Your Blood Pressure in This Range
If your blood pressure is already normal, the goal is simply to keep it there. Blood pressure tends to rise with age, so the habits you build now have a real payoff later. Here’s what makes the biggest difference:
- Stay active. At least 30 minutes of moderate aerobic exercise most days (walking, cycling, swimming) can lower blood pressure by 5 to 8 points. Strength training at least twice a week helps too.
- Eat enough potassium. Aiming for 3,500 to 5,000 mg of potassium daily from foods like bananas, potatoes, and leafy greens can reduce blood pressure by 4 to 5 points.
- Watch your sodium. Keeping sodium under 1,500 mg per day is ideal for most adults. That alone can lower blood pressure by 5 to 6 points.
- Maintain a healthy weight. Blood pressure drops roughly 1 point for every kilogram (about 2.2 pounds) of weight lost.
- Sleep 7 to 9 hours a night. Poor sleep is an underappreciated driver of rising blood pressure over time.
- Limit alcohol and avoid smoking. Both raise blood pressure, and the effects compound with regular use.
A diet rich in whole grains, fruits, vegetables, and low-fat dairy while low in saturated fat can lower blood pressure by up to 11 points. That’s a larger effect than most single medications produce, and it’s relevant even if your numbers are currently normal, because it helps them stay that way as you age.
Tracking your blood pressure at home every few months gives you an early warning if things start trending upward. Catching a slow rise early, before it crosses into the elevated or hypertensive range, gives you the most options for course correction through lifestyle alone.