Which muscle group is primarily engaged in the Corkscrew exercise?

The Corkscrew exercise primarily engages the abdominal muscles, particularly targeting the deep core muscles, such as the transversus abdominis and obliques. This exercise requires a strong activation of the core to control the movement of the legs as they perform the corkscrew motion. The engagement of the abs establishes stability in the pelvis and spine, allowing for controlled rotation and movement.

While the spinal muscles play a role in maintaining posture and stability during the exercise, the primary focus is on core engagement. The hip flexors may assist in initiating the leg movement, but they do not dominate the exercise's mechanics as the abs do. The calves are not significantly involved since the Corkscrew exercise primarily emphasizes core stabilization and control rather than lower leg activity. Therefore, the abdominal muscles are the major players in executing this exercise effectively.