Phoenix — Older adults can lower their risk of dying of heart disease and other conditions by increasing their physical activity – and it doesn’t have to be strenuous, a pair of studies presented by the American Heart Association indicate. During one of the studies, researchers evaluated nearly 1,300 participants in the Framingham Offspring Study. The average age of the participants was 69. They found that light-intensity physical activity, such as casual walking or doing household chores, was linked to a 20% lower risk of . . .