The short answer is at least 150 minutes a week, or 75 minutes if you work harder. For healthy adults the weekly target is at least 150 minutes of moderate intensity activity, or at least 75 minutes of vigorous intensity activity, plus muscle-strengthening work on two or more days. That is the recommendation set out by who.int and repeated in national guidance such as the nhs.uk activity guidelines for adults aged 19 to 64. None of it requires a gym: brisk walking, cycling, dancing, swimming and sport all count.
What the weekly numbers actually mean
The two aerobic numbers are treated as roughly interchangeable, because 75 minutes of vigorous work is considered to carry benefits similar to 150 minutes of moderate work. Intensity is the variable, not the stopwatch.
| What | Weekly target | Typical examples |
|---|---|---|
| Moderate aerobic | At least 150 minutes | Brisk walking, cycling, dancing, water aerobics |
| Vigorous aerobic | At least 75 minutes | Running, fast cycling, swimming, team sport |
| Muscle strengthening | Two or more days | Weights, resistance bands, push-ups, heavy gardening |
| Pattern | Spread over four to five days, or daily | Several short sessions all count towards the total |
How to tell which intensity you are working at
Moderate activity raises your heart rate and makes you breathe faster and feel warmer, but you can still hold a conversation. The standard test is that you can talk while doing it, but not sing. Vigorous activity makes you breathe hard and fast, so you can only say a few words before pausing for breath. Most moderate activities become vigorous when you push the pace, which is why the same bike ride can count towards either column.
Strength work is counted separately from aerobic minutes. It is not a substitute for them. Muscle-strengthening activity should be hard enough that you need a short rest before repeating the effort, and it can be done on the same days as your aerobic sessions or on different days, whichever fits your week.
Why the weekly total matters more than any single session
The guidelines are written as a weekly total, and longer sessions are not required. Health agencies note that even exercise once or twice a week is associated with a lower risk of heart disease and stroke, and that several short sessions of very vigorous activity can also be used to reach the target. A 20 minute walk on four days plus a longer weekend ride can land in the same place as three long gym visits.
Sedentary time is a second, separate issue. Long uninterrupted periods of sitting are linked to poorer health outcomes regardless of how much activity you do overall, so breaking up sitting time with some movement is part of the recommendation rather than a bonus.
What if you are currently well below the target
According to WHO, around 31 per cent of adults worldwide, about 1.8 billion people, do not meet the recommended level of activity, and people who are insufficiently active have a 20 to 30 per cent higher risk of death than those who are sufficiently active. The full recommendation is published in the who.int global guidelines on physical activity, whose position is that any amount of physical activity is better than none, and that all activity counts.
That makes the sensible starting point the smallest version you will actually repeat: ten minutes most days, added up, with the strength days built in later. A plan that survives a busy month is worth more than a perfect plan that lasts a week.
Making the week work in practice
- Spread it out. Four to five active days is easier to sustain than two punishing ones, and it matches how the guidelines are framed.
- Use the talk test in real time. If you cannot speak a sentence, you are above moderate. If you can sing, push the pace.
- Count what you already do, then add to it. Commutes on foot, stairs and household work all involve movement that can be increased deliberately.
- Keep two strength days simple. Bodyweight work at home qualifies; the requirement is the major muscle groups, not equipment.
- Check first if you need to. If you have a medical condition, have not exercised for some time, or are pregnant, get advice before increasing intensity.
Bottom line: 150 moderate minutes or 75 vigorous minutes a week, plus two strength days, spread across the week, is the target most adults are measured against. Track the weekly total, not the individual workout, and start at whatever level you can repeat.
This article is general information and is not medical advice. If you have a health condition, are pregnant or post-partum, or have been inactive for a long period, speak to a qualified health professional before changing your routine.