Which exercise from the Reformer Family 7 is focused on lateral flexion?

The Short Box Mermaid exercise specifically targets lateral flexion, emphasizing the engagement of the oblique muscles and promoting flexibility of the spine. This exercise requires the practitioner to sit on the Short Box while maintaining stability and control, allowing for a side bending motion that enhances strength, mobility, and coordination.

In contrast, while the other exercises may engage various muscle groups and promote different movements, they do not primarily focus on lateral flexion in the same way. The Mermaid with a Twist incorporates rotation along with lateral flexion, but its focus is more on integrated movement rather than solely lateral bending. The Long Box Swan focuses primarily on extension of the spine and strengthening the back muscles. The Jackknife is designed to develop core strength and coordination but involves hip flexion and extension rather than lateral flexion. Thus, the Short Box Mermaid stands out as the exercise dedicated to lateral flexion within the Reformer Family 7.