Don’t let the name of this exercise fool you, it is a an assisted squat which effectively works the quadriceps (leg muscles).
Grasp a weight rack or bar for support with one arm and hold a free weight plate across your chest with your other hand.
With your abs drawn in, squat down lowering your body to the floor until your knees are almost fully flexed.
Return to the starting position.
Note: Keep your feet placed firmly on the floor throughout this exercise.