How Stress and Overwork Affect Your Heart and Brain

Chronic stress is linked to heart conditions such as hypertension, irregular heart rhythms, and even heart attacks. It can also lead to unhealthy coping habits like smoking, overeating, or avoiding physical activity, which further increase the risk.

Your brain is just as affected. Long-term stress can shrink the hippocampus—the part responsible for memory and learning—while overactivating the amygdala, which heightens anxiety and emotional reactions. Working too much without enough rest or sleep reduces focus, weakens decision-making, and affects emotional control. Over time, this can increase the risk of burnout, depression, and even cognitive decline.

Mental fatigue also makes it harder to cope with stress, creating a cycle that’s difficult to break