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Your Fitness Level Can Improve Cancer Risk and Survival

April 30, 2026  |  3 min read

Your Fitness Level Can Improve Cancer Risk and Survival

We all know that regular exercise supports heart health, helps maintain a healthy weight, and contributes to overall well-being. But research now shows that your level of fitness may also play an important role in lowering cancer risk and improving survival after a cancer diagnosis.

Fitness and Cancer Risk

A growing body of research shows that people with higher levels of cardiorespiratory fitness (how well your heart and lungs support physical activity) tend to have a lower risk of developing certain cancers.

Studies have found the strongest connections with:

  • Colorectal cancer
  • Lung cancer

Higher fitness levels have been associated with significantly lower risk of developing these cancers, even after accounting for factors like age, weight, and smoking status.

Fitness and Cancer Survival

Fitness doesn’t just play a role in prevention; it may also impact outcomes after a cancer diagnosis.

Research shows that individuals with higher levels of fitness:

  • Are more likely to have better overall survival
  • Have a lower risk of cancer-related death
  • Experience improved cardiovascular health during and after treatment

Even modest improvements in fitness can make a difference. Earlier long-term studies found that small increases in fitness levels were linked to meaningful reductions in both cancer-related and cardiovascular mortality, and more recent research continues to support these findings.

What We Know Today

More recent research has reinforced a key message:

  • Regular physical activity is associated with a lower risk of several types of cancer
  • Fitness is considered a modifiable risk factor, meaning it’s something you can improve
  • Even short bursts of activity or moderate exercise can have measurable health benefits
  • Physical activity after a cancer diagnosis may help improve outcomes and quality of life

You don’t need intense or prolonged workouts to see benefits—consistency is what matters most.

Building Cardiorespiratory Fitness

Improving fitness can look different for everyone. Some effective ways to get started include:

  • Brisk walking
  • Biking
  • Swimming
  • Strength training
  • Taking the stairs or adding short activity breaks throughout the day

The goal is to gradually increase your activity level over time in a way that feels sustainable.

Let’s Talk

If you have questions about your health or want guidance on starting an exercise routine, a primary care provider can help you take the next step. Boulder Medical Center providers are here to support your long-term health and wellness.

Resources

The information in this article is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your health care provider regarding any medical condition or before making changes to your treatment plan.
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