Which muscle group is worked during the merger of movements in the Basic Swan (Chair)?

The Basic Swan exercise, particularly when performed on the Chair, primarily engages the muscles of the back. This movement focuses on extending the spine and opening up through the chest, which calls upon the strength and stability of the back muscles, particularly the erector spinae, latissimus dorsi, and several smaller stabilizing muscles in the upper and lower back.

During this exercise, as the body seeks to lift and arch upwards from a prone position, the back muscles work to control this extension and provide support through the spine. The awareness and control in the back are essential for executing the movement safely and effectively, highlighting the significance of strengthening this muscle group.

While the arms, chest, and shoulders are used to some extent during the movement, they primarily serve to support the positioning and stabilization of the body as the back muscles do the main work of lifting and extending the spine. Therefore, the focus on the back muscles during the Basic Swan makes this the correct answer.