During the exercise referred to as the Mermaid, what role do the deltoids play?

In the Mermaid exercise, the deltoids play a crucial role in assisting with lateral movement. This exercise involves reaching and elongating the spine laterally while maintaining a stable base. The deltoids, being responsible for shoulder abduction and flexion, help lift and support the arm during the lateral reach. As the body bends to the side, the deltoids engage to ensure smooth and controlled movement, allowing for a stretch of the lateral torso while maintaining stability through the shoulders. This action not only contributes to the effectiveness of the Mermaid exercise in developing flexibility and strength but also helps in enhancing overall shoulder mobility and coordination.