It is estimated that about 30-40% of cancers can be prevented by lifestyle and dietary changes alone.  Transitioning from a sedentary way of life to staying active, and maintaining a healthy BMI or body weight are key contributors to reducing cancer risk.  Often pre-cancerous lesions transform into a malignancy over some time. During this latency, our physical fitness can help reverse the molecular pathways that could result in carcinogenesis.

https://www.sammprada.com/cancer-screening-prevention-at-community-schools/