FTCE Physical Education K-12 Practice Test

The option discussing enhancing muscle fatigue is correct because warming up is intended to reduce muscle fatigue, not increase it. The primary purpose of warming up is to prepare the body for physical activity by gradually increasing heart rate, circulation, and temperature in the muscles, which increases their efficiency. Warming up helps to enhance overall performance and reduces the likelihood of fatigue during exercise.

In contrast, the other options highlight important benefits of warm-ups: they reduce the risk of injuries by preparing muscles and joints for the stress of physical activity, lead to increased body temperature for improved muscle flexibility, and improve reaction time, making the body more responsive during exercise. Thus, enhancing muscle fatigue contradicts the fundamental goals of a warm-up routine.