How does the "hundred" exercise differ from the "coordination" exercise?

The "Hundred" exercise is designed to enhance the engagement of the abdominals while also incorporating the shoulder extensors. This exercise typically involves a pumping motion of the arms combined with a rhythmic breathing pattern, which helps to stimulate the circulatory system and provide a foundation for core stability. The focus on integrating the abdominals with the movement of the arms highlights the importance of core engagement during the exercise.

On the other hand, the "Coordination" exercise emphasizes coordination and timing, particularly between the upper and lower body, and it focuses on moving the legs and arms in tandem. While the core is involved, the primary aim of "Coordination" is to cultivate the synchrony of movements rather than focusing predominantly on the engagement of the abdominals.

This distinction clarifies why the correct answer highlights the integration of the abdominals and shoulder extensors in the "Hundred," showcasing its unique focus compared to the "Coordination" exercise, which emphasizes overall movement coordination rather than solely targeting the core musculature.