from hands and knees, extend one leg straight back parallel to floor, then return to start position.
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. Lift one knee off the floor and straight as parallel to the floor, bend the knee to starting position and repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.
