Why Sitting All Day Threatens Your Heart and What to Do

Sitting continuously for hours means the heart does less work and the circulatory system slows down. This sedentary pattern triggers metabolic changes that elevate cholesterol and increase the load on blood vessels. Experts recommend at least five minutes of light activity every hour—standing, walking, or simple leg lifts—to keep blood flowing. Even if a person exercises in the morning or evening, the benefits are offset if the rest of the day is spent glued to a chair; consistent movement throughout the day is essential for cardiovascular safety.