
step forward onto pillow-topped step with one leg, follow with other leg while contracting glutes, then step down alternating legs
Stand facing the step on which 1 pillow is placed, lift off one leg from floor and place forward on step, followed by other leg with squeezing the buttocks. Lower down one leg on floor behind followed by other leg for starting position. Repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.