In a May 2013 study in Medicine & Science in Sports & Exercise in which rats and mice got antidepressant-like effects from running on a wheel, researchers concluded that physical activity was an effective alternative to treating depression.
Maybe running doesn’t cure cancer, but there’s plenty of proof that it helps prevent it. A vast review of 170 epidemiological studies in the Journal of Nutrition showed that regular exercise is associated with a lower risk of certain cancers. What’s more, if you already have cancer, running (with your doctor’s approval) can improve your quality of life while you’re undergoing chemotherapy.
Even if you meet just the minimum of amount of physical activity—(30 minutes, 5 times per week), you’ll live longer. Studies show that when different types of people started exercising, they lived longer. Smokers added 4.1 years to their lives; nonsmokers gained 3 years. Even if you’re still smoking, you’ll get 2.6 more years. Cancer survivors extended their lives by 5.3 years. Those with heart disease gained 4.3 years.