Pilates footwork can be considered as a movement analogous to a squat.
Nevertheless, unlike a traditional standing squat, Pilates footwork is carried out while lying on a reformer machine.
To be more precise, during this exercise, one should lie with their back flat on the carriage, place their feet on the foot bar (with the foot bar in an upward position), and rest their head on the head rest.
The motion in footwork consists of pushing away from the foot bar to fully extend the legs. Subsequently, the legs are bent, similar to entering a squat position. This action returns the carriage to its initial position.
You can learn how to do Pilates Reformer footwork with below step by step videos.