What is the primary aim of the "cool down" phase after exercise?

The primary aim of the "cool down" phase after exercise is to gradually lower heart rate and promote recovery. This phase is critical because it helps transition the body from a state of high activity back to a resting state. During intense physical activity, the heart rate increases to supply oxygen-rich blood to the muscles. The cool down allows the heart rate and blood pressure to decrease gradually, which helps prevent dizziness and fainting that can occur if a person stops exercising abruptly.

Additionally, this phase can facilitate the removal of metabolic waste products that have accumulated during the workout, such as lactic acid, and aids in the recovery of muscle tissue. Stretching often included in the cool down can enhance flexibility and reduce muscle stiffness.

The other options misrepresent the purpose of the cool down phase. Increasing muscle strength and maintaining a high heart rate are not goals associated with this phase, while preparing for intense workouts is more relevant to a warm-up phase rather than a cool down.