When should flexibility exercises ideally be performed to maximize effectiveness?

Flexibility exercises are most effective when the body is warm. When muscles are warm, they exhibit increased elasticity, which can enhance the range of motion and reduce the risk of injury. Warm muscles are more pliable and adaptable, making them better suited for stretching activities. This is why it is often recommended to perform flexibility exercises after a general warm-up or following physical activity, as the body's temperature increases through movement.

Additionally, performing flexibility exercises when the body is cold can lead to decreased performance and a higher likelihood of strains or injuries. Stretching before physical activity without first warming up the muscles can also be less effective, as the body may not be adequately prepared for the demands of the activity. Therefore, incorporating flexibility training when the body is warm maximizes its benefits, making option C the most suitable choice.