Multitasking can negatively affect the effectiveness of a workout by dividing attention and energy. When individuals multitask during exercise, such as checking messages or watching TV, they may compromise their form and technique, leading to decreased performance and increased risk of injury. Focusing solely on the workout allows for better engagement in exercises, enhancing their intensity and efficacy. Therefore, dedicating undistracted time to exercise can lead to improved results and greater satisfaction with one's fitness routine.