1.Sit down on a leg press machine and place your legs in front of you wide apart on the platform while your upper legs and your lower legs are forming a 90 degrees angle.
2.Use your quadriceps to press the platform up until your legs are fully extended in front of you, and your body is forming a 90 degrees angle between upper body and legs.
3.Lower the platform slowly to the starting position until your upper and lower legs are forming a 90 degrees angle, and repeat.
Tips and Advises:
Make sure that your back remains stationary on the machine though out the movement.