India, April 1 -- Too much sitting has quietly emerged as one of the most common threats to heart health in the United States.

Research shows that prolonged sedentary time is linked to a higher risk of heart disease, stroke and poor mental health-even among people who exercise regularly.

On National Walking Day, the American Heart Association is urging people to break that cycle by moving more, starting with something as simple as a walk.

Observed on Wednesday, April 1, National Walking Day offers communities across the country a chance to step away from sedentary routines and make movement part of everyday life. Walking remains one of the most accessible forms of physical activity and can be adapted to suit different abiliti...