Youth Fitness Tied to Lower Cancer Risk

A new large-scale study has found that higher cardiorespiratory fitness in young men is strongly associated with a reduced risk of developing nine types of cancer later in life.
Study's Time: 5 minutes

The original source of this research was published in the British Journal of Sports Medicine, and its data is based on the following reputable sources.

A new large-scale study has found that higher cardiorespiratory fitness in young men is strongly associated with a reduced risk of developing nine types of cancer later in life. Published in the British Journal of Sports Medicine, the research analyzed data from over 1 million Swedish men who underwent mandatory military fitness testing around age 18 and were tracked for more than three decades.

This article is brought to you by Dr. Saeed Behckamclinical psychologist, counselor, and sex therapist serving clients in Iran (Tehran) and Canada (Toronto, Richmond Hill, and Vancouver).

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A new large-scale study has found that higher cardiorespiratory fitness in young men is strongly associated with a reduced risk of developing nine types of cancer later in life.

Key Findings:

The study found that young men with high levels of cardiorespiratory fitness (CRF) had significantly lower rates of cancer in the:

  • Head and neck (↓19%)

  • Kidney (↓20%)

  • Lung (↓42%—largely influenced by smoking)

  • Esophagus, liver, bile ducts, gallbladder (↓~40%)

  • Stomach and colon (↓20%)

Cardiorespiratory fitness, defined by the American Heart Association as the ability of the heart and lungs to supply oxygen during sustained physical activity, was measured using a stationary bike test. The participants were divided into low, moderate, and high CRF groups.

Dr. Aron Onerup, lead author and pediatric researcher at the University of Gothenburg, explained that “as fitness increases, the risk of cancer decreases,” especially for gastrointestinal cancers.

Forest plot showing the results for CRF at conscription and incidence of site-specific cancer.
Forest plot showing the results for cardiorespiratory fitness at conscription and incidence of site-specific cancer.

Unexpected Outcomes:

Interestingly, the study also observed:

  • A 7% higher risk of prostate cancer in the high-CRF group (possibly due to increased screening)

  • A 31% higher risk of skin cancer (possibly due to greater outdoor activity and sun exposure)

These findings highlight the complex interactions between fitness, lifestyle, and health outcomes.

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A 31% higher risk of skin cancer (possibly due to greater outdoor activity and sun exposure)

Limitations and Considerations

As an observational study, this research cannot confirm causation. Variables like diet, alcohol consumption, smoking habits, and changes in fitness over time were not accounted for. Still, the data provides compelling evidence to support physical fitness as a cancer prevention strategy.

Supporting Studies:

  • A recent study in JAMA Oncology showed that even 4–5 minutes of vigorous physical activity can reduce cancer risk in inactive individuals.

  • Another found that 11 minutes of moderate-to-vigorous activity daily could lower risks of cancer, cardiovascular disease, and premature death.

Key Takeaways

  • Higher fitness in youth = lower cancer risk later in life

  • Most dramatic reductions observed in gastrointestinal cancers

  • Lifestyle and screening practices can influence cancer risk stats

  • Even short bursts of physical activity can make a difference

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Lifestyle and screening practices can influence cancer risk stats

💓 How Cardiorespiratory Fitness Boosts Sexual Health and Intimacy

1. Improved Blood Flow = Better Sexual Performance
Higher cardiovascular fitness enhances blood circulation throughout the body—including to the sexual organs. This leads to stronger erections in men and increased natural lubrication and sensitivity in women.

2. Balanced Hormones and Increased Libido
Regular aerobic exercise (like running, swimming, or cycling) helps balance hormones such as testosterone and estrogen, which directly influence sex drive in both men and women.

3. Reduced Stress and Sexual Anxiety
Working out reduces cortisol (stress hormone) and boosts mood-enhancing chemicals like serotonin and dopamine, helping lower anxiety and improve sexual confidence and enjoyment.

4. Greater Energy and Endurance
Cardiorespiratory fitness means better stamina not just at the gym but also in the bedroom. Couples report more satisfying and longer-lasting intimate experiences.

5. Better Body Image = Higher Sexual Confidence
Being physically fit often leads to better self-esteem and body confidence, which is deeply connected to feeling more secure, open, and empowered during sex.

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Being physically fit often leads to better self-esteem and body confidence, which is deeply connected to feeling more secure, open, and empowered during sex.

Looking for expert advice on enhancing your mental and sexual health?
If you’re ready to take control of your psychological, relational, or sexual well-being, Dr. Saeed Behckamone of the top Iranian clinical psychologists and sex therapists in Tehran or in Canada (Toronto, Richmond Hill, and Vancouver), is here to help.

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