Journal · Health
How Much Exercise Do You Need a Week? The Guidelines, Made Simple
This article is general information, not medical advice. If you have a heart condition, other health problems, are pregnant, or have not been active for a long time, please talk to a doctor before starting a new exercise routine.
Fitness advice can feel like a shouting match. One voice says you need an hour a day. Another swears by seven-minute workouts. Another sells you a programme that seems designed for someone who has never had a job, children or a bad knee.
So let us go to the quieter, steadier source: the international guidelines, written by people whose job is to read all the evidence and say something sensible.
The short answer
According to the World Health Organization's 2020 guidelines, adults aged 18 to 64 should aim for (WHO, 2020; Bull et al., 2020):
- 150-300 minutes of moderate-intensity aerobic activity per week, or
- 75-150 minutes of vigorous-intensity aerobic activity per week, or an equivalent mix of the two;
- plus muscle-strengthening activities involving the major muscle groups on two or more days a week;
- and to limit sedentary time, replacing some of it with activity of any intensity, even light.
Older adults (65+) are additionally advised to include balance and strength activities on three or more days a week to help prevent falls. The UK's NHS guidance is essentially the same.
If you want a single number to remember: about 150 minutes a week, which is 30 minutes, five days a week, plus two strength sessions.
Why this matters (and why so many miss it)
Physical inactivity is common. The WHO estimates that about 31% of adults worldwide, roughly 1.8 billion people, do not meet the recommended levels of activity (WHO, Physical activity fact sheet).
The guidelines do not exist to make anyone feel guilty. They exist because the evidence consistently links regular activity with better physical and mental health. No guideline can promise a particular result for a particular person, but on the balance of evidence, moving more is one of the most reliable gifts you can give your future self.
What counts as moderate and vigorous?
You do not need a heart-rate monitor. Use the talk test:
- Moderate: you are breathing faster and feel warmer; you can talk, but not sing. Examples: brisk walking, cycling on flat ground, dancing, mowing the lawn, water aerobics.
- Vigorous: you are breathing hard; you can say only a few words before pausing. Examples: running, swimming fast, cycling uphill, skipping rope, many sports.
One minute of vigorous activity counts roughly the same as two minutes of moderate activity.
What counts as muscle-strengthening?
Anything that makes your muscles work harder than usual: bodyweight exercises (squats, push-ups against a wall or the floor, lunges), resistance bands, weights, carrying heavy shopping, digging in the garden, yoga or pilates. The aim is to work the major muscle groups (legs, hips, back, abdomen, chest, shoulders, arms) until the last few repetitions feel challenging.
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How to start if you are starting from zero
Begin smaller than you think
The WHO guidance itself says that doing some activity is better than none, and that people should start small and build up gradually. If you are inactive now, a ten-minute walk every day is a real and honourable beginning.
Break it into pieces
The 150 minutes does not need to arrive in heroic blocks. A brisk ten minutes after breakfast, lunch and dinner adds up to thirty. Many people find small pieces far easier to fit around work and family.
Choose something you do not hate
The best exercise is the one you will keep doing. Walking with a friend, dancing in the kitchen, cycling to the shop, swimming, gardening, playing football with your children. Enjoyment is not a luxury here. It is the strategy.
Attach strength to something you already do
Ten squats while the kettle boils. Wall push-ups before your shower. Calf raises while brushing your teeth. Strength training does not have to mean a gym membership.
Sit less, in small ways
Stand up during phone calls. Take the stairs for one floor. Walk to a colleague instead of messaging them. Every break from sitting is a small vote for your health.
Track it honestly
Write down your minutes each day. Watching the weekly total climb from 40 to 80 to 150 is deeply encouraging. It also shows you, in plain numbers, that you are capable of change.
A sample beginner's week
| Day | Activity |
|---|---|
| Monday | 20-minute brisk walk + 10 minutes of bodyweight strength |
| Tuesday | 30-minute brisk walk |
| Wednesday | Rest or gentle stretching |
| Thursday | 20-minute brisk walk + 10 minutes of bodyweight strength |
| Friday | 30-minute walk, dance or cycle |
| Saturday | 45 minutes of something you enjoy outdoors |
| Sunday | Rest, or an easy family walk |
That is around 150 minutes of moderate activity and two strength sessions. Adjust it to your life, your body and your doctor's advice.
Common mistakes to avoid
Too much, too soon. The most common reason beginners stop is soreness or injury from doing far more than their body is used to. Build up over weeks, not days.
All or nothing. Missing a planned session does not cancel the week. Ten minutes on a busy day still counts towards your total.
Ignoring strength. Many people only walk or run. The guidelines also ask for muscle-strengthening on two or more days a week, so do not leave it out.
Sitting all day, then sprinting once. An hour at the gym does not fully offset ten hours in a chair. Break up long sitting where you can.
Ignoring warning signs. Chest pain, severe breathlessness, dizziness or pain that does not settle are reasons to stop and seek medical advice, not to push through.
Why consistency beats intensity
A moderate routine you keep for a year will do more for you than an extreme programme you abandon in a fortnight. Choose a level you could happily repeat next week, and the week after. Progress comes from showing up, not from punishing yourself.
Your movement task
For the next seven days, take a brisk ten-minute walk after one meal each day. Note the minutes in a small notebook or on your phone. On day seven, add up the total and write one sentence about how you feel.
You do not need to become an athlete. You only need to become someone who moves a little more than last week. Lane one is open. Step in.
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On the move with you,
The Chief
Sources
- World Health Organization (2020). WHO guidelines on physical activity and sedentary behaviour. who.int/publications/i/item/9789240015128
- Bull, F. C., Al-Ansari, S. S., Biddle, S., et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine, 54(24), 1451-1462. doi.org/10.1136/bjsports-2020-102955
- World Health Organization. Physical activity (fact sheet). who.int/news-room/fact-sheets/detail/physical-activity
- NHS. Physical activity guidelines for adults aged 19 to 64. nhs.uk/live-well/exercise/physical-activity-guidelines-for-adults-aged-19-to-64/
Related reading: Benefits of walking every day · How to start eating healthy · How to be more disciplined
Questions
How much exercise do adults need per week?
The WHO recommends adults aged 18-64 do at least 150-300 minutes of moderate-intensity aerobic activity, or 75-150 minutes of vigorous activity (or a mix), each week, plus muscle-strengthening activities on two or more days.
Is walking enough exercise?
Brisk walking counts as moderate-intensity activity, so for many adults it can meet the aerobic guideline. Adding muscle-strengthening activity twice a week completes the picture.
How do I know if exercise is moderate or vigorous?
A simple test: during moderate activity you can talk but not sing; during vigorous activity you can only say a few words before pausing for breath.
What if I cannot reach 150 minutes?
Some activity is better than none. The WHO guidelines say adults should start with small amounts and gradually increase frequency, intensity and duration. If you have a health condition, ask a doctor what is right for you.
General information for wellbeing, not medical, psychological or financial advice. If you are struggling, see crisis help.