Effective warm-up exercises for runners are crucial for preparing the body and reducing injury risk. Dynamic stretches, such as leg swings, high knees, and butt kicks, help activate the legs and increase blood flow. Additionally, performing a few minutes of easy jogging can gradually raise heart rate and body temperature. Also, incorporating exercises like lunges and arm circles can enhance mobility and activate key muscle groups. Warm-ups should be tailored to the runner's experience level and the intensity of the upcoming run, ensuring a safe and effective transition into training.