Which muscles are primarily engaged during the Boomerang exercise?

The Boomerang exercise predominantly engages the core muscles and hip extensors, making the choice of core muscles and hip extensors the correct one. This exercise is designed to create a dynamic flow that strengthens the abdominal region, including the rectus abdominis and obliques, while also requiring stabilization from the hip extensors, such as the gluteus maximus and hamstrings.

Engaging these muscle groups is essential as they play a vital role in maintaining proper form and facilitating the movement transitions that the Boomerang requires. The exercise involves bending, rolling, and achieving a balance that relies on a strong core foundation, which is critical for performance in Pilates and for overall functional movement.

The other options focus on muscle groups that, while used in the exercise, are not the primary focus. For example, although shoulder engagement is necessary for some stability and control, it is not the main purpose of the Boomerang. Likewise, leg muscles and glutes provide some support, but they do not dominate the movement; instead, they assist in maintaining balance. Lastly, arms and neck involvement is more about stabilization rather than engagement, making them secondary in the context of the Boomerang's primary muscle focus.