What does the "Roll Up" exercise involve on the Reformer?

The "Roll Up" exercise on the Reformer is characterized by lifting the upper body sequentially while articulating the spine. This movement engages the core and emphasizes spinal flexion and extension, promoting flexibility and strength in the abdominal muscles and the spine.

During the exercise, the individual starts in a supine position, typically lying flat on their back with arms extended overhead, and then rolls up to a seated position while bending forward and reaching towards the toes. The sequential movement allows for a gradual articulation of the spine through each vertebra, enhancing control and awareness of spinal alignment. This exercise effectively targets the abdominal region and improves overall body coordination.

Other movements, such as rolling backward quickly or holding a plank position, do not align with the focus of the Roll Up, which is about controlled movement rather than speed or maintaining a static position. Stretching the legs while keeping the torso stationary also does not encapsulate the essence of the Roll Up, as the core movement relies on the integration of both the upper body and spine dynamics.