A safe approach to increasing workout intensity involves gradual progression, typically adhering to the 10% rule, where one increases exercise duration, frequency, or intensity by no more than 10% weekly. This approach minimizes the risk of injury and allows the body to adapt to increased demands. Including variety in workouts and listening to the body for signs of fatigue or discomfort are essential. Adequate rest and recovery are also crucial, as they enable muscles to repair and strengthen, facilitating ongoingly safer, effective intensity increases.