Though guidelines suggest the cardiovascular systems of those over 75 years old would benefit from regular physical activity, few studies have actually evaluated this relationship. Using ten years of data collected from 4,207 men and women, researchers found the more physically active the participant, the lower their risk for a heart attack or stroke. In one example cited by the authors of the study, the risks for heart attack and stroke were essentially cut in half among those who habitually walked at a 3 mph (~4.82 kmh) pace when compared with those who normally walked at a 2 mph (~3.21 kmh) pace. Circulation, November 2015