Which lifestyle factor is NOT a risk factor for hypertension?

A healthy diet is indeed not a risk factor for hypertension; in fact, it is a protective factor. A balanced diet that includes a variety of nutrients, particularly one rich in fruits, vegetables, whole grains, and low in saturated fats and sodium, can help to lower blood pressure and contribute to overall cardiovascular health.

In contrast, the other options listed are associated with an increased risk for hypertension. Inactivity can lead to weight gain and other health issues that contribute to higher blood pressure. Obesity is a well-known risk factor for hypertension, with excess body weight often leading to increased blood pressure due to various physiological changes. Tobacco use adversely affects blood vessels and can raise blood pressure, as well as increase the risk of cardiovascular diseases. Therefore, maintaining a healthy diet is essential for reducing the risk of hypertension, making it the correct choice in this context.