Which muscles are targeted during the circles up and down exercise in the Supine Leg Series on the reformer?

The circles up and down exercise in the Supine Leg Series on the reformer primarily targets the adductors and hamstrings. This exercise involves moving the legs in circular patterns, which requires stabilization and engagement from the inner thigh muscles, known as the adductors. At the same time, the hamstrings play a crucial role in controlling the motion of both the up and down movements, as well as providing support during the exercise to maintain alignment and efficacy.

While other muscle groups may be engaged to some extent, the focus on the circle's motion emphasizes the contribution of the adductors for drawing the legs together and the hamstrings for maintaining proper extension and flexion during the exercise. The recruitment of these specific muscle groups is essential for developing strength, coordination, and flexibility, further enhancing overall leg control and stability in Pilates practice.