What muscles are primarily focused on during the "Teaser 2" exercise?

The "Teaser 2" exercise in Pilates primarily emphasizes the engagement of the abdominal muscles, back extensors, and hip flexors. The abdominals are crucial for initiating the movement and maintaining a strong core, which is necessary to lift the torso while keeping the legs elevated. This exercise challenges the core stability and requires the use of the deep abdominal muscles, particularly the transverse abdominis, to control the movement effectively.

In addition to the abs, the back extensors play a role in maintaining spinal alignment and control throughout the exercise, supporting the back as the torso rises. Meanwhile, the hip flexors are engaged to facilitate the lifting of the legs, helping to create that characteristic "V" shape when performing the movement. The integration of these muscle groups contributes to the overall effectiveness of the Teaser 2 exercise in developing core strength and stability.

The other options focus on different muscle groups that are not primarily engaged in the execution of the Teaser 2, thus making them less relevant for this specific exercise.