How is the C Curve defined in Pilates?

The C Curve is defined in Pilates as the action of scooping the abdominals while keeping the chest and neck open. This movement involves drawing the abdominal muscles in and upward, creating a rounded shape in the spine while maintaining an open position in the chest and neck area. It emphasizes core engagement and spinal flexion, which are vital for building strength and stability in the abdominal region. This technique not only enhances muscle control but also promotes proper alignment and breathing.

In contrast, flattening the lower back against the floor focuses more on lumbar stability rather than the dynamic curve of the spine that the C Curve embodies. Holding the breath does not effectively engage the core; Pilates encourages breathing through movements to enhance oxygen flow and maintain a rhythmic pace. Arching the back to create a bridge diverges from the C Curve concept, which is about curling the spine rather than extending it. Thus, the C Curve is specifically about the engagement of the core and the rounded shape of the spine while retaining an open chest, making option B the accurate definition.