Which of the following is a primary function of a cool down?

The primary function of a cool down is to facilitate a gradual transition from exercise to rest, allowing the body to return to its pre-exercise state. During this period, one key aspect is flexibility training, which involves gentle stretching of the muscles that have been engaged during the workout. This helps to prevent stiffness, promotes better circulation, and aids in the recovery process. Stretching during the cool down can help maintain or improve flexibility and range of motion, which is beneficial for overall fitness and injury prevention.

In contrast, increasing muscle mass is primarily accomplished through resistance training and progressive overload rather than during the cool down phase. Cardiovascular endurance is improved during the main workout through sustained aerobic activity, not during the cool down. Maximizing energy output refers to the peak performance during exercise, not the recovery phase. Therefore, flexibility training as part of the cool down is essential for supporting muscle recovery and maintaining flexibility.