Best practices for warming up before exercising include dynamic stretching, mobility exercises, and gradual increases in intensity. A proper warm-up enhances blood flow to the muscles, increases heart rate, and prepares the body for physical activity, reducing the risk of injuries. Dynamic stretches, such as leg swings or arm circles, engage the muscles in movement and enhance flexibility. Additionally, incorporating sport-specific movements at lower intensities helps the body adapt to the upcoming exercise, ensuring optimal performance and reducing the likelihood of strains or sprains during the main workout.