Dr. Guilherme Packer
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How to control hypertension with lifestyle changes

Arterial hypertension is one of the most prevalent chronic conditions in Brazil — and one of the most underestimated. It does not hurt, it does not bother you day to day, but it is the leading modifiable risk factor for heart attack, stroke and kidney disease. The good news: in some cases, consistent lifestyle changes lower blood pressure by an amount comparable to a medication — and improve everything else.

Below is what the most solid scientific literature (including the 2025 Brazilian Hypertension Guideline and the American ACC/AHA guideline) recommends. No magic formulas — just what works.

DASH diet and sodium

The DASH diet (Dietary Approaches to Stop Hypertension) is the dietary pattern with the strongest evidence for lowering blood pressure. In short:

  • More fruits, vegetables, legumes, whole grains and low-fat dairy.
  • Less red meat, sugars and ultra-processed foods.
  • Sodium below 2 g/day (about 5 g of salt). Pay special attention to cured meats, ready-made seasonings, hard cheeses, snacks and frozen meals — they concentrate most of the salt in the diet.

Small reductions in sodium make a difference. In hypertensive patients, cutting 1 g of sodium per day already lowers systolic pressure by an average of 2 to 4 mmHg.

Regular physical activity

The recommendation is simple and based on strong evidence: 150 minutes of moderate-intensity aerobic activity per week — 30 minutes, five days a week. Brisk walking, cycling, swimming. Strength training twice a week complements the effect. People who stay active lower their systolic pressure by 5 to 8 mmHg.

Sleep and stress

Chronically sleeping fewer than 6 hours per night is associated with a higher risk of hypertension. Treating sleep apnea, when present, is an essential part of blood pressure control. Stress-management techniques — meditation, breathing, physical activity, therapy — do not replace treatment, but they have a measurable effect.

Alcohol

High alcohol consumption raises blood pressure in a dose-dependent manner. The recommendation, for those who choose to drink, is no more than two drinks per day for men and one for women — and ideally less.

Body weight

Each 1 kg of weight lost lowers blood pressure by an average of 1 mmHg. In overweight patients, losing 5 to 10% of body weight already produces clinically significant effects.

  • Weight loss

    Goal
    About 1 mmHg per kg lost
    Approximate reduction (mmHg)
    −5

  • DASH diet

    Goal
    Fruits, vegetables, whole grains, low-fat dairy
    Approximate reduction (mmHg)
    −11

  • Less sodium

    Goal
    Cut at least 1 g/day (optimal < 1.5 g/day)
    Approximate reduction (mmHg)
    −5 to −6

  • More potassium

    Goal
    3.5–5 g/day, preferably from food
    Approximate reduction (mmHg)
    −4 to −5

  • Aerobic exercise

    Goal
    90–150 min per week
    Approximate reduction (mmHg)
    −5 to −8

  • Moderate alcohol

    Goal
    Up to 2 drinks/day (men) and 1 (women)
    Approximate reduction (mmHg)
    −4
Source: 2017 ACC/AHA guideline (Whelton et al., Hypertension 2018), table of nonpharmacological interventions. Average values in people with hypertension; the effects do not simply add up.

Home blood-pressure self-measurement

Measuring blood pressure at home (with a validated automatic arm device) is one of the best allies of treatment. I recommend measuring in the morning and at night, for 7 days, with two consecutive readings, and bringing the recorded numbers to the appointment. This avoids the white-coat effect and allows more precise adjustments.

When to see the doctor

Lifestyle changes are the first pillar of treatment — but they do not replace medical follow-up, especially when there are other risk factors (diabetes, high cholesterol, family history). The ideal is to build, together, a realistic and sustainable plan.

Taking care of your blood pressure is taking care of the long term. It is not about a radical turnaround — it is about consistency.

Frequently asked questions

What is a normal blood pressure?

According to the 2025 Brazilian Hypertension Guideline, blood pressure is considered normal below 120/80 mmHg. Values of 120–139 and/or 80–89 mmHg are now called pre-hypertension, and hypertension is defined from 140/90 mmHg, confirmed by repeated readings — ideally also outside the office (ambulatory or home monitoring). Lifestyle changes are recommended from 120/80 mmHg onward.

Does the DASH diet really lower blood pressure?

Yes, it is one of the most studied eating patterns for this purpose. In the DASH-Sodium trial (NEJM, 2001), a diet rich in fruits, vegetables, whole grains and low-fat dairy lowered blood pressure, and the effect was larger when combined with less sodium. The 2017 American guideline estimates an average reduction of about 11 mmHg in systolic pressure in people with hypertension. Individual responses vary.

How much salt can I eat per day if I have high blood pressure?

The usual guidance is to keep sodium below 2 g per day, which corresponds to about 5 g of salt (one level teaspoon), counting both added salt and the salt in processed foods. A systematic review published in the BMJ (2013) showed that cutting about 4.4 g of salt per day lowered systolic pressure by a little over 5 mmHg, on average, in people with hypertension.

Is it possible to control high blood pressure without medication?

In some cases, yes — especially in pre-hypertension and in some cases of stage 1 hypertension with low cardiovascular risk. Even so, many people will need medication to reach the target, which in the 2025 Brazilian guideline is below 130/80 mmHg, when tolerated. Lifestyle and medication are not mutually exclusive: the decision depends on the readings, on individual risk and on medical follow-up.

References

  1. Brandão AA, Rodrigues CIS, Bortolotto LA, Armstrong ADC, Mulinari RA, Feitosa ADM, et al. Brazilian Guidelines of Hypertension – 2025. Arq Bras Cardiol. 2025;122(9):e20250624. doi.org/10.36660/abc.20250624
  2. Whelton PK, Carey RM, Aronow WS, Casey DE Jr, Collins KJ, Dennison Himmelfarb C, et al. 2017 ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults. Hypertension. 2018;71(6):e13-e115. doi.org/10.1161/HYP.0000000000000065
  3. Sacks FM, Svetkey LP, Vollmer WM, Appel LJ, Bray GA, Harsha D, et al. Effects on blood pressure of reduced dietary sodium and the Dietary Approaches to Stop Hypertension (DASH) diet. N Engl J Med. 2001;344(1):3-10. doi.org/10.1056/NEJM200101043440101
  4. He FJ, Li J, MacGregor GA. Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials. BMJ. 2013;346:f1325. doi.org/10.1136/bmj.f1325
  5. Neter JE, Stam BE, Kok FJ, Grobbee DE, Geleijnse JM. Influence of weight reduction on blood pressure: a meta-analysis of randomized controlled trials. Hypertension. 2003;42(5):878-84. doi.org/10.1161/01.HYP.0000094221.86888.AE
  6. Roerecke M, Kaczorowski J, Tobe SW, Gmel G, Hasan OSM, Rehm J. The effect of a reduction in alcohol consumption on blood pressure: a systematic review and meta-analysis. Lancet Public Health. 2017;2(2):e108-e120. doi.org/10.1016/S2468-2667(17)30003-8
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