Which of the following is NOT an application for the barrel?

The application for the barrel in Pilates is primarily focused on enhancing flexibility, strength, and integration within various movements. While the barrel is effectively used for stretching trunk flexors, supporting the trunk during lateral flexion, and facilitating full-body integration exercises, its primary function is not aimed at specifically strengthening the legs.

The barrel is often utilized for exercises that involve the upper body and trunk, where its structure supports and enhances the movement quality rather than targeting lower body strength directly. In contrast, leg strengthening is typically achieved through exercises that do not involve the barrel, which emphasizes core stability and alignment more than leg engagement. Therefore, identifying that strengthening legs is not an application for the barrel aligns with the objectives and characteristics of Pilates equipment usage.