Simplify the following text for a Grade 12 native English-speaking person.
Original: Exercise hypertension may indicate that an individual is at risk for developing hypertension at rest .
Simplified: Stopping smoking , does not directly reduce blood pressure , but it is very important for people with hypertension because it reduces the risk of many dangerous outcomes of hypertension , such as stroke and\/or heart attack . Mild hypertension can usually be treated by diet , exercise , and improved physical fitness .