Stay active as you age to extend your health span

According to the “active grandparent” hypothesis, humans evolved to be physically active throughout life. That frequent movement helps ward off chronic disease (including heart disease) and promotes longevity. While hunter-gatherers had to be active to survive, they also had a natural instinct to avoid unnecessary activity to preserve energy when food was scarce. Modern humans don’t need to expend physical effort to meet their basic needs for food and survival. Instead, they must exercise (defined as discretionary activity for the sake of health) to stay healthy and live a long life.