To enhance flexibility in a fitness routine, incorporating a mix of dynamic stretching and static stretching is most effective. Dynamic stretching involves moving parts of the body through a full range of motion gently, which prepares muscles for activity. After workouts, engaging in static stretching helps further improve flexibility by promoting muscle recovery and elongation. Additionally, practices like yoga and Pilates can also promote flexibility and core strength. Consistent implementation of these techniques can gradually improve overall mobility and reduce the risk of injury during physical activities.