Which primary muscle groups are actively engaged during the "teaser" exercise?

The "teaser" exercise primarily engages the abdominals and back extensors because it is designed to develop core strength and stability. During this movement, the abdominal muscles work to curl the torso up while simultaneously engaging the muscles of the back to maintain a neutral spine and counterbalance the motion. This coordinated effort helps in promoting overall core strength, which is essential in Pilates for executing many other movements effectively.

The back extensors provide stability to the spine as the individual lifts their legs and upper body off the mat, creating a V-position. This interaction is key to maintaining proper alignment and balance while executing the exercise. By focusing on these muscle groups, the "teaser" not only strengthens the core but also enhances the control necessary for advanced Pilates movements.