Compelling evidence suggests exercise is an important component of cancer prevention and care; slashing your risk of developing cancer, improving your chances of successful recuperation, and diminishing your risk of cancer recurrence.A pattern revealed in these studies is that the longer you exercise, the more pronounced the benefits. Studies show that both men and women who exercise during their early years have a lower risk of cancer later in life.But like most things in life, exercise must also be done in moderation and be balanced. There is a sweet spot and excessive exercise can cause its own set of issues, but most in the U.S. are far from being at risk for this problem.