The seated leg curl machine targets the legs, mainly the hamstrings but also the glutes (the gluteus maximus, gluteus medius and gluteus minimus) ∧ hip flexors.
First, adjust the front pad so that it sits just underneath your ankles. Adjust the back pad so that you are sitting comfortably. Once seated, select an appropriate weight for you. Place your legs on top of the pad, making sure the pad is resting on your ankles. Then adjust the pad above your leg so it is secures your legs down (just below your knees).
Grab the handles, push doward leading with your feet, with a slow controlled movement back up.