Regular exercise is associated with a lower risk of developing certain cancers, including of the head, neck, and lungs. The benefits of exercise extend even to those who have been with cancer, as they tend to live longer than those who don’t exercise. The risk reduction is particularly significant for head and neck, breast, and lung cancers. Interestingly, the impact of exercise on cancer risk to be dose-dependent, with more exercise leading to a greater reduction in risk. These findings, while based on observational data, paint a nuanced picture of the relationship between exercise and cancer. Despite the inability to establish a cause-and-effect relationship, the data suggests that regular exercise could potentially stave off cancer. Furthermore, individuals who exercise regularly and later develop cancer are still less likely to die of any cause, indicating a benefit. These insights provide ample to maintain an exercise habit for its potential cancer-preventive effects.