Survivorship: During and After Treatment

Physical Activity When You Have Cancer

Research shows that for most people, exercise is safe and helpful before, during, and after cancer treatment.

Physical activity can improve your quality of life and give you more energy to do the things you like. It may also help you cope with the side effects of treatment and possibly lower your risk of new cancers in the future. Exercise is also a great way to relieve stress, which is an important part of getting and staying well.

Benefits of exercise before, during, and after cancer treatment

Many cancer care teams encourage people to be as physically active as possible before, during, and after treatment.

Regular exercise has many health benefits. It can:

  • Help your body and brain work better
  • Improve muscle strength, bone health, and range of motion
  • Strengthen your immune system
  • Help you get to and maintain a healthy weight
  • Reduce treatment side effects
  • Help with breast cancer-related lymphedema
  • Decrease the chance that some types of cancer will come back

It can also improve your quality of life by:

  • Reducing fatigue (the feeling of being very tired)
  • Increasing your appetite
  • Decreasing depression and anxiety
  • Helping you sleep better

Physical activity recommendations for cancer survivors

The American Cancer Society (ACS) created a Nutrition and Physical Activity Guideline for Cancer Survivors. This guideline promotes physical activity for improved cancer outcomes.

The ACS guideline recommends that cancer survivors:

  • Take part in regular physical activity.
  • Start slowly and increase physical activity over time.
  • Build up to at least 150-300 minutes of moderate-intensity activity or 75-150 minutes of vigorous-intensity (or a combination of these). Getting even more activity is ideal.
  • Include muscle-strengthening exercise at least 2 days per week.

These are general guidelines. You can find more information, including how much to exercise for specific cancer-related side effects, on the American College of Sports Medicine Moving through Cancer website.

Exercising at each stage of your cancer journey

Each person is different. The best level of exercise for you will depend on your situation. The goal is to exercise in a way that helps you keep your muscle strength and allows you to continue the daily activities you want and need to do.

The more active you are, the better you’ll be able to exercise and function. But even if you must stop exercising, it’s still a good idea to stay active by continuing your normal daily routines as much as possible.

Becoming more physically active before you start treatment, or staying active if you already are, could help you manage and recover more easily.

  • Research shows that being as active as possible may reduce complications from surgery.
  • Physical activity may also help you cope with distress and anxiety, have more energy, and sleep better as you begin treatment.

Many people find that it’s harder to be physically active during treatment, but the goal is to stay as active as you can.

Certain things can affect your ability to exercise during treatment, such as:

  • The type and stage of your cancer
  • Your treatment
  • Your energy, strength, and fitness level before and during treatment

If you exercised before cancer treatment, you might need to exercise less or at a lower intensity during treatment. If you were very inactive before treatment, you may need to start small. For example, you could start with a low-intensity activity like short, slow walks.

Ask your cancer care team about exercising during treatment and whether there are any limits to what you can do.

As side effects lessen, most people can slowly increase the time and intensity of their exercise.

A low or moderate-intensity activity for a healthy person can seem like a high-intensity activity for some cancer survivors. Take your time and be patient with yourself as you gradually increase your activity. Remember that the most important thing is to move as much as you can.

During this time, physical activity is important for your overall health and quality of life. Research shows that getting to and staying at a healthy weight, eating right, and being physically active may help reduce the risk of getting a second cancer and other serious, chronic diseases.

A healthy lifestyle might also reduce the risk of some cancers coming back.

A number of studies have looked at the impact of physical activity on cancer recurrence and long-term survival. Studies of people with breast, colorectal, and prostate cancers suggest that survivors who are physically active have a lower risk of cancer recurrence and improved survival compared with those who are inactive.

Physical activity may also help if your cancer has spread or has become advanced and cannot be cured. Exercise may decrease your fatigue, improve your quality of life, and make it easier to move and use your body.

The amount of physical activity you can tolerate will depend on the type and stage of your cancer, your current physical ability, side effects, and any other health problems. Before starting new activities or becoming more active, check with your cancer care team to see if it is safe for you.

Getting started

Always check with your health care team before starting an exercise program, especially if you have any of the following:

Also ask if any of the medicines you take might affect how physically active you can be.

Take special care when you start or increase exercise

  • Avoid exercise if you feel dizzy or are unsteady on your feet.
  • Do not exercise above a moderate level of exertion without talking with your doctor. Moderate exertion is about as much effort as a brisk walk.
  • Avoid any activity that puts you at risk for falls or injury.
  • If you notice swelling, pain, dizziness, or blurred vision, call your doctor right away.
  • If you have numbness in your feet or problems with balance, you are at higher risk for falls. Ask about devices that might help you.

Consider working with a certified trainer or physical therapist

Some people can safely begin or maintain their own exercise program, but many people have better results working with a certified personal trainer or physical therapist. These trained professionals can help you find the type of exercise that’s right and safe for you.

Check with your doctor before you start working with a certified trainer or physical therapist. Also be sure the person you work with knows about your cancer diagnosis and any limitations you have.

Keep safety in mind

As you start to exercise or increase your activity level, it’s important to keep your cancer care team updated. Tell them if you get injured or if you have pain, shortness of breath, or take longer than usual to recover after a workout.

  • Stay away from uneven surfaces that could make you fall.
  • If you plan to exercise outside, find someplace safe and well-lit.
  • Drink plenty of fluids unless you’ve been told not to.
  • Don’t play contact sports.
  • Take someone with you or make sure someone knows where you are in case you have trouble.
  • If you are at greater risk of infection, you may need to stay away from public gyms and crowds until your risk returns to normal.

Begin slowly

Even a few minutes of activity each day will help you. Slowly increase how often and how long you exercise. Listen to your body to know when you need to slow down and rest.

Exercise as you are able. Don’t push yourself while you’re in treatment. Rest when you need to. If you feel very tired, try doing 10 minutes of light exercise each day and build up from there.

Try short periods of exercise with frequent rest breaks. For example, walk briskly for a few minutes, slow down, then walk briskly again until you’ve done 30 minutes of brisk activity. You can also divide your activity into three 10-minute sessions. You’ll still get the benefits of the exercise.

Try more than one kind of exercise

Strength training, stretching, and cardio exercise are all important parts of a good fitness program. Try to include a variety of physical activities, including ones that:

  • Use large muscle groups such as your thighs, abdomen (belly), chest, and back
  • Help you keep lean muscle mass and bone strength, like resistance bands or light weights
  • Increase your flexibility and keep the range of motion in your joints

Remember to warm up and cool down

5-minute warm-up: Always start with 5 minutes of warm-up exercises. Examples include shoulder shrugs, lifting your arms overhead, toe tapping, marching in place, and knee lifts.

5- to 10-minute cooldown: End each exercise session by cooling down with stretching or flexibility exercises. Hold a stretch for 30 seconds to 1 minute, then relax. Examples include reaching overhead, deep breathing, and bending over to touch your toes so that you relax all the muscle groups.

Special considerations

If you want to swim while getting radiation therapy, check with your radiation team first. You should be able to swim if you don’t have any skin irritation or sores, but be sure to rinse off after getting out of a pool to lower the chance of skin irritation.

Use caution with heavy weights or exercises that put too much stress on your bones if you have osteoporosis, cancer that has spread to the bone, arthritis, nerve damage, poor vision, poor balance, or weakness. You may be more likely to hurt yourself or break a bone.

If you have a feeding tube or a catheter (central line in your chest), avoid pool, lake, or ocean water and other exposures that may cause infections. Don’t do strength training that uses muscles in the area of the catheter. This could dislodge it. Ask your cancer team what’s safe for you.

Tips to help you stick to your exercise

  • Set short-term and long-term goals.
  • Focus on having fun.
  • Do something different to keep it fresh. Try yoga, dancing, or tai chi.
  • Ask friends, family, or coworkers to join you.
  • Use charts or a fitness tracker to record your progress.
  • Recognize and reward your achievements.

Starting an exercise program can be a big task, even for a healthy person. It may be even harder if you have a chronic illness, especially if you weren’t used to exercising before your diagnosis.

If you exercised regularly before you were diagnosed with cancer, you may need to reduce the intensity and length of your exercise sessions for a while. Remember, only do what you feel up to doing. Over time, you can build back up as you feel ready.

The goal is to be as active as possible. Keep it safe, keep it fun, and make it work for you.

More Resources

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The American Cancer Society medical and editorial content team

Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as editors and translators with extensive experience in medical writing.

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Last Revised: November 12, 2025

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