Exercising can do more than just carve out your ideal physique: a new study found that it has favourable effects on the outcomes of prostate cancer. A previous study found that men with higher levels of physical activity have a lower risk of death and prostate cancer recurrence, and another, that men with prostate tumours that have more regularly shaped blood vessels have more favourable outcomes. In this preliminary study, researchers analysed data from 572 men with prostate cancer in the Health Professionals Follow-Up Study to find out if the exercise men got prior to diagnosis with prostate cancer affected the shape of blood vessels in prostate tumors. They found that men who walked the fastest (3.5 to 4 mph) prior to diagnosis had 8% more regularly shaped blood vessels in their tumors than men with the slowest walking pace (1.5 to 2.5 mph). They do however note that randomized, controlled trials are needed before they can confirm their findings.