The findings, by an international team of researchers, suggest muscular strength is as important as staying slim and eating healthily when it comes to protecting the body against deadly tumours.
The scientists who came up with the findings are recommending men weight train at least twice a week, exercising muscle groups in both the upper and lower body.
In recent years, experts have recommended a healthy diet and lifestyle - including regular aerobic exercise such as jogging or cycling to reduce the risks of the disease.
But the latest study, published in the journal Cancer Epidemiology, Biomarkers and Prevention, suggests it may be just as important to build up muscle strength.
