Which exercise includes strengthening the inner thighs and external rotators?

The exercise that strengthens the inner thighs and external rotators is indeed Advanced Side Balance and Control. This exercise is designed to engage the adductors (inner thighs) as the legs work to maintain balance and control while lifted. At the same time, the muscles responsible for external rotation of the hip are activated to stabilize the pelvis and trunk during the movements.

This dynamic nature of the Advanced Side Balance and Control goes beyond simply maintaining balance; it requires coordination and strength from the inner thighs and external rotators to execute the movement effectively. The combination of these muscle groups working together enhances overall stability and alignment, which is essential in Pilates practice.

In contrast, the other options emphasize different muscle groups or movement patterns. Reverse Swan/Teaser II primarily targets the back extensors and core muscles while focusing on extension and articulation of the spine. Side Pull Up integrates upper body strength and stabilization more than concentrating on the inner thighs. Swan Dive emphasizes back extension and shoulder mobility, not directly targeting the inner thigh strength or external rotation.