
quadruped position sliding one foot backward via knee extension then returning to start
Get down on hands and knee position i.e on 4 points ( both hands and both knees), hands under the shoulder and knees under the hip. With maintaing the position, slide the toes of one foot away from the body by straightening the knee. Slide back to starting position and repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.