The complete guide to exercise and high blood pressure

Blood pressure is the force your blood pushes against your artery walls. It goes up when your vessels are stiff or narrow, when your heart works harder than it needs to, or when your kidneys hold onto too much fluid and salt. Exercise nudges all three in the right direction.

When you train regularly, the lining of your blood vessels gets better at releasing a signal that tells them to relax and widen. Your heart becomes more efficient, so it moves the same blood with fewer, calmer beats. Your body also handles salt and stress hormones better. None of this is dramatic on any single day, but repeated over weeks it lowers the resting number your doctor measures.

Blood pressure is written as two numbers, for example 140 over 90. The top number is the pressure while your heart beats. The bottom number is the pressure while it rests between beats. Most guidelines call 130 over 80 or above high, though your own target depends on your age and health, so use your doctor's number, not a general one.

A 5 to 7 mmHg fall in the top number sounds small on paper. It is not. A change of that size, held over years, meaningfully lowers your chance of a heart attack or stroke. That is why exercise sits alongside diet and, when needed, medication as a real treatment and not a wellness extra.

Aerobic exercise means anything that raises your heart rate and keeps it up: brisk walking, cycling, swimming, jogging, dancing. This is the single most studied and most effective type of movement for blood pressure.

The World Health Organization and the American College of Sports Medicine point to a similar target: about 150 minutes a week of moderate activity, which works out to around 20 to 30 minutes on most days. Moderate means you can talk but not comfortably sing. You do not have to hit it all at once, and shorter daily sessions count.

For years, people with high blood pressure were told to avoid weights. That advice has changed. Current guidance treats moderate resistance training as safe and helpful for most people, with its own smaller drop in resting pressure of around 2 to 3 mmHg, on top of what aerobic work gives you.

Two sessions a week covering the main muscle groups is the usual target. The key is technique: breathe out on the effort, never hold your breath and strain, and choose weights you can control for a full set. Straining hard while holding your breath spikes pressure briefly, which is the part to avoid.

You do not need a gym or a perfect programme. This is a realistic starting point to shape with your doctor.

1. Walk briskly most days. Aim for 20 to 30 minutes at a pace where talking is easy but singing is not. This is your daily anchor and the biggest single lever.
2. Add two short strength sessions. Legs, back, chest, arms, core. Bodyweight or bands are fine to start. Breathe out on the effort and never hold your breath under load.
3. Break up long sitting. Stand and move for a couple of minutes every half hour or so. It sounds trivial, but across a day it supports your numbers.
4. Build up slowly. If you are new to this, start below what you think you can do and add a little each week. The goal is a habit you keep for years, not a hard fortnight.
5. Track your pressure over weeks. Measure at the same time of day, seated and rested, and look at the trend rather than any single reading. Patterns you can see are patterns you can improve.

For most people with high blood pressure, moderate exercise is safe and one of the best things they can do. A few situations, though, need a word with your doctor before you push the intensity.

Warm up gently, avoid holding your breath while straining under heavy load, and cool down rather than stopping dead after hard effort, which can make you dizzy. If you feel unwell, stop. And keep taking any prescribed medication unless your doctor tells you otherwise; exercise adds to it, it does not replace it.