What lifestyle factor is a significant risk for developing cardiovascular disease?

Smoking is a significant lifestyle factor that increases the risk of developing cardiovascular disease. The harmful substances in tobacco smoke can damage blood vessels, reduce oxygen in the blood, and lead to a buildup of plaque in the arteries. This plaque buildup, or atherosclerosis, narrows the arteries and restricts blood flow, increasing the chances of heart attacks, stroke, and other cardiovascular issues.

In contrast, the other options involve positive lifestyle changes. Healthy eating helps in maintaining a balanced diet rich in nutrients, which can support heart health; regular exercise promotes cardiovascular fitness and helps maintain a healthy weight; and reducing stress can lower the risk of hypertension and other stress-related health issues. All these positive factors contribute to a lower risk of cardiovascular diseases, reinforcing why smoking stands out as a detrimental factor.