New research is confirming what we have known: physical activity significantly improves symptoms of depression, anxiety and distress. Hippocrates, who is the father of medicine in the 5th century understood this and said "if you are in a bad mood, go for a walk. If you are still in a bad mood, go for another walk." The Hippocratic Oath is what doctors in training swear to uphold. Hippocrates taught his medical students that illness is derived from three sources - diet, lifest