Physical activity is one of the most reliable ways to improve and protect your health. Regular movement is associated with better cardiovascular health, stronger muscles and bones, improved sleep, better mental health, and a lower risk of several chronic diseases.
But how much physical activity do you actually need?
For most adults, current guidelines recommend 150 to 300 minutes of moderate-intensity aerobic activity per week, or 75 to 150 minutes of vigorous activity, along with muscle-strengthening activities on at least two days a week. More activity can provide additional benefits, but you do not have to reach those amounts immediately to benefit. Some physical activity is better than none.
Here’s what current guidelines and research show about physical activity, how much you need, what counts as exercise, and the health benefits associated with staying active.
What Is Physical Activity?
Physical activity is any movement that requires your body to use energy.
It includes much more than going to a gym. Walking, cycling, running, swimming, playing sports, dancing, doing household chores, gardening and some forms of work can all involve physical activity.
The World Health Organization considers activity performed during transportation, work, household tasks, recreation and planned exercise when making its recommendations.
Exercise is a type of physical activity that is usually planned and structured, such as running, swimming laps or following a strength-training program.
That distinction matters because you do not need to spend every day in a gym to become more physically active.
How Much Physical Activity Do Adults Need?
For adults ages 18 to 64, the major guidelines are broadly consistent.
Adults should aim for:
- 150 to 300 minutes of moderate-intensity aerobic activity per week, or
- 75 to 150 minutes of vigorous-intensity aerobic activity per week, or
- an equivalent combination of moderate and vigorous activity.
Adults should also perform muscle-strengthening activities involving the major muscle groups on at least two days per week.
The U.S. Physical Activity Guidelines similarly recommend 150 to 300 minutes of moderate activity or 75 to 150 minutes of vigorous activity each week, combined with muscle-strengthening activity on at least two days.
What does that look like in real life?
One simple example would be:
30 minutes of brisk walking, five days a week, plus two strength-training sessions.
But there is no requirement to follow that exact schedule.
You could walk for 20 minutes on some days, cycle on another day, play a sport on the weekend and add strength training twice a week.
The important point is the overall amount and intensity of activity throughout the week.
Moderate vs. Vigorous Activity
Not all physical activity requires the same amount of effort.
Moderate-intensity activity
Moderate activity makes your heart beat faster and your breathing become noticeably heavier, but you can generally continue a conversation.
Examples include:
- Brisk walking
- Recreational cycling
- Dancing
- Water aerobics
- Some forms of hiking
- Recreational activities that raise your heart rate
Vigorous-intensity activity
Vigorous activity requires substantially more effort. Your breathing becomes much harder, and carrying on a conversation becomes difficult.
Examples can include:
- Running
- Fast cycling
- Swimming laps
- Some forms of vigorous sports
- High-intensity aerobic activities
The exact intensity can vary between people. An activity that feels moderate to one person may feel vigorous to another.
What Are the Health Benefits of Physical Activity?
The benefits of physical activity extend well beyond fitness.
Research and public-health guidelines associate regular physical activity with benefits involving the heart, metabolism, brain, mental health, sleep, bones and muscles.
Heart and cardiovascular health
Regular physical activity can reduce the risk of cardiovascular disease and stroke. It can also help lower blood pressure and improve cardiovascular fitness.
The CDC says adults who get at least 150 minutes of moderate physical activity per week can reduce their risk of cardiovascular disease, with additional activity providing further benefits.
Physical activity is therefore not only about improving athletic performance. It can also support long-term cardiovascular health.
Type 2 diabetes
Regular physical activity is associated with a lower risk of developing type 2 diabetes.
Physical activity can improve the body’s ability to use insulin and can contribute to healthier body composition and metabolic health. The WHO identifies type 2 diabetes among the chronic diseases for which physical activity can help prevent and manage risk.
Cancer
Physical activity is also associated with a lower risk of several types of cancer.
The CDC currently identifies lower risks for eight cancers: bladder, breast, colon, endometrial, esophageal, kidney, lung and stomach cancers.
This does not mean exercise eliminates cancer risk. Cancer has many causes, and physical activity is only one factor among many.
The evidence instead supports the more specific conclusion that regular physical activity is associated with a lower risk of developing several cancers.
Mental health
The benefits are not limited to physical health.
Regular physical activity can reduce symptoms of anxiety and depression and can contribute to overall psychological well-being.
The CDC also notes that some benefits can occur after individual sessions of moderate- to vigorous-intensity activity, including short-term reductions in feelings of anxiety.
Physical activity should not be treated as a replacement for professional treatment when someone has a mental health condition. But it can be an important part of a broader approach to health.
Brain and cognitive health
Physical activity is also linked with brain health.
The WHO guidelines identify cognitive health among the outcomes that can benefit from physical activity, while the CDC says regular activity can reduce the risk of developing dementia, including Alzheimer’s disease.
Research in this area continues to develop, but the overall evidence supports physical activity as part of a healthy lifestyle for maintaining brain health as people age.
Sleep
Physical activity can also improve sleep.
The CDC lists improved sleep as both an immediate and longer-term benefit of physical activity, while WHO’s evidence review identifies sleep among the health outcomes associated with regular activity.
For some people, becoming more active may therefore benefit both daytime health and nighttime sleep.
Bones, muscles and balance
Strength training and other weight-bearing activities can help maintain muscle and bone health.
This becomes particularly important with age.
For adults 65 and older, the basic aerobic recommendations are similar to those for younger adults, but WHO also recommends activities that emphasize balance and help prevent falls for older adults with poor mobility.
Strength training is therefore not only for people trying to build larger muscles. It can help support everyday physical function.
Does Walking Count as Physical Activity?
Yes.
Walking is one of the simplest ways to increase physical activity, particularly when it is performed at an intensity that raises your heart rate.
A brisk walk can count toward moderate-intensity aerobic activity. Walking for transportation can count as well.
This is one reason the 150-minute recommendation should not be interpreted as 150 minutes inside a gym.
WHO emphasizes that physical activity can come from transportation, work, household activities, recreation and planned exercise.
Is 150 Minutes a Week a Minimum?
It is better understood as a target for substantial health benefits, rather than a line separating healthy people from unhealthy people.
The U.S. guidelines emphasize that adults should move more and sit less, and that people who perform some moderate- or vigorous-intensity physical activity can gain health benefits even if they do not reach 150 minutes per week.
WHO similarly emphasizes that some physical activity is better than none. People who are currently inactive can start with smaller amounts and gradually increase the duration, frequency or intensity of their activity.
That makes the recommendation much more practical.
Someone who currently does almost no physical activity does not need to suddenly begin exercising for five hours every week.
Starting with a short daily walk and gradually doing more can still be meaningful.
Is More Exercise Always Better?
Not necessarily in a simple, unlimited sense, but the guidelines do indicate that additional physical activity can provide additional health benefits.
WHO says adults can increase moderate-intensity activity beyond 300 minutes per week, or the vigorous equivalent, for additional benefits when appropriate.
That does not mean everyone needs to exercise for several hours every day.
The appropriate amount of activity depends on factors including age, fitness, health conditions, abilities and the type of activity being performed.
For someone who is inactive, increasing activity gradually may be more realistic and sustainable than immediately attempting a very demanding routine.
What About Sitting Too Much?
Physical activity is only part of the picture.
Modern life can involve long periods of sitting at work, during transportation and at home.
WHO’s guidelines also address sedentary behaviour and emphasize reducing prolonged inactivity alongside increasing physical activity.
That means a person can benefit from looking for opportunities to move throughout the day rather than viewing exercise as something that happens only during a scheduled workout.
Taking a walk, standing up regularly, using stairs or cycling for transportation can all help increase movement.
Physical Activity for Older Adults
Adults 65 and older generally have the same aerobic targets as younger adults: 150 to 300 minutes of moderate activity or 75 to 150 minutes of vigorous activity per week, along with muscle-strengthening activities on at least two days.
Older adults should also include activities that improve balance and help prevent falls, particularly through multicomponent activities that combine balance and strength.
The goal does not have to be athletic performance.
Maintaining strength, balance, mobility and the ability to perform everyday tasks can be just as important.
What If You Have a Health Condition?
People with chronic health conditions or disabilities can also benefit from physical activity.
WHO recommends that adults with chronic conditions who cannot meet the standard targets should still aim to be as physically active as their abilities and circumstances allow, when activity is not contraindicated.
However, the appropriate type and amount of activity can vary substantially depending on the condition.
Anyone with a significant medical condition, major physical limitation or concern about starting a new exercise program should discuss appropriate activity with a qualified health professional.
Physical Activity and Weight Loss
Physical activity can contribute to weight management, but exercise and weight loss are not the same thing.
Body weight is influenced by energy intake, physical activity, metabolism, genetics, sleep and other factors.
Regular physical activity can increase energy expenditure and help prevent weight gain. It can also be particularly important for maintaining weight loss over time.
For that reason, it is misleading to describe exercise as a guaranteed way to lose a particular amount of weight.
Its benefits extend far beyond the number on a scale.
How to Become More Physically Active
For someone who is currently inactive, the simplest approach is often to start small.
You could:
- Take a short walk each day.
- Walk instead of driving for some short trips.
- Take the stairs when practical.
- Add a few short periods of activity throughout the day.
- Begin basic strength exercises two days a week.
- Choose activities you actually enjoy.
- Gradually increase the amount of activity over time.
The goal is not to create the perfect workout plan on the first day.
The goal is to make regular movement part of everyday life.
The Bottom Line
For most adults, current guidelines recommend 150 to 300 minutes of moderate-intensity aerobic activity per week, or 75 to 150 minutes of vigorous activity, along with muscle-strengthening activities on at least two days a week.
Regular physical activity is associated with a wide range of health benefits, including better cardiovascular health, improved sleep, better mental health, stronger bones and muscles, and lower risks of several chronic diseases.
But 150 minutes is not a cliff.
If you are currently inactive, doing less than the recommended amount is still better than doing nothing. Start with manageable activity and gradually do more as your fitness and circumstances allow.
Physical activity does not have to mean spending hours in a gym. Walking, cycling, household tasks, recreational activities, sports and structured exercise can all contribute.
The most useful goal is not simply to “exercise more.” It is to move more, sit less and build a level of regular physical activity that you can maintain over time.
Frequently Asked Questions
How much physical activity should adults get each week?
Adults should aim for 150 to 300 minutes of moderate-intensity aerobic activity, 75 to 150 minutes of vigorous activity, or an equivalent combination each week. Muscle-strengthening activity should also be performed on at least two days per week.
Is 30 minutes of exercise a day enough?
Thirty minutes of moderate activity on five days of the week would provide 150 minutes of activity, which meets the lower end of the weekly aerobic recommendation for adults.
Does walking count as exercise?
Yes. Walking is physical activity, and brisk walking can qualify as moderate-intensity aerobic activity.
What if I cannot exercise for 150 minutes a week?
You can still benefit from doing less. Major guidelines emphasize that some physical activity is better than none. If you are currently inactive, start with manageable amounts and gradually increase your activity.
Do I need to go to a gym to get the health benefits?
No. Walking, cycling, sports, dancing, household activities and other forms of movement can contribute to physical activity. Strength-training exercises can also be performed outside a traditional gym.
Is more than 300 minutes of exercise a week beneficial?
It can be. WHO says adults may receive additional health benefits by increasing moderate-intensity activity beyond 300 minutes per week, or the vigorous equivalent, when appropriate.
Does physical activity reduce the risk of cancer?
Regular physical activity is associated with a lower risk of several cancers, including breast, colon, endometrial, kidney, lung and stomach cancers, among others. It does not eliminate cancer risk.
Can physical activity improve mental health?
Yes. Regular physical activity is associated with reduced symptoms of anxiety and depression and can contribute to overall well-being.
