Fitness
How Much Exercise Do Adults Actually Need Each Week?
The World Health Organization's evidence-based weekly activity targets for adults: how much aerobic exercise and strength training most adults need, and why even a little is worth it.
Regular activity is one of the most powerful things a person can do for long-term health: it supports the heart, muscles, mood, sleep, and metabolism. The good news is that the targets are more achievable than most people think, and the benefits start well before they are reached.
This guide covers the World Health Organization's current weekly recommendations for adults: how much aerobic activity, how much strength work, and how to make the numbers fit a real schedule.
The weekly targets at a glance
- 150–300 minutes of moderate-intensity aerobic activity per week, OR 75–150 minutes of vigorous-intensity, or an equivalent mix (WHO, 2020).
- Muscle-strengthening activity on 2 or more days per week, working all major muscle groups (WHO, 2020).
- Even some activity is better than none: health benefits begin below the targets, and more activity adds further benefit up to a broad ceiling.
- Reduce time spent sitting; replacing sedentary time with activity of any intensity helps (WHO, 2020).
Aerobic activity: the foundation
A common target is 150–300 minutes of moderate aerobic activity a week, roughly 30 minutes on five days, though any split works. For those who prefer harder effort, 75–150 minutes of vigorous activity delivers similar benefit, and the two can be combined. Moderate means a person can talk but not sing (a brisk walk, easy cycling); vigorous means only a few words at a time are possible (running, fast swimming).
Strength training: don't skip it
The WHO recommends muscle-strengthening activity on at least two days a week, covering all the major muscle groups (legs, hips, back, chest, core, shoulders, arms). This can be lifting weights, resistance bands, bodyweight exercises, or heavy gardening. Beyond building strength and protecting bone and muscle with age, strength work has its own payoff: in a 2022 meta-analysis of cohort studies, doing muscle-strengthening activity was associated with roughly 10–20% lower all-cause mortality, with the association strongest at about 30–60 minutes per week.
Combine both for the biggest payoff
Aerobic and strength training are not an either/or choice: they complement each other. In the same 2022 analysis, people who did both had a markedly larger reduction in mortality risk than those who did only one. The practical message: build a week that includes regular cardio and a couple of strength sessions, rather than choosing between them.
WHO weekly activity targets for adults (18–64)
| Type | Weekly target |
|---|---|
| Moderate aerobic activity | 150–300 minutes |
| OR vigorous aerobic activity | 75–150 minutes |
| Muscle-strengthening | 2+ days (all major muscle groups) |
Frequently asked questions
- How much exercise do I need each week?
- The WHO recommends 150–300 minutes of moderate aerobic activity (or 75–150 minutes of vigorous activity) per week, plus muscle-strengthening on 2 or more days.
- What counts as moderate versus vigorous activity?
- A simple test: during moderate activity a person can talk but not sing (a brisk walk); during vigorous activity only a few words are possible before needing a breath (running, fast cycling).
- Is a small amount of exercise still worth it?
- Yes. The WHO is explicit that some activity is better than none: health benefits begin below the recommended targets, so any step up from being inactive counts.
References
- WHO Guidelines on Physical Activity and Sedentary Behaviour (2020) · World Health Organization. Accessed 2026-05-26.
- World Health Organization 2020 guidelines on physical activity and sedentary behaviour (Bull et al.) · British Journal of Sports Medicine, 2020. Accessed 2026-05-26.
- Muscle-strengthening activities and lower risk/mortality in major non-communicable diseases (Momma et al.) · British Journal of Sports Medicine, 2022. Accessed 2026-05-26.