This is a great overall leg exercise to strengthen the quads, hamstrings, as well as the glutes, inner thighs and hip flexors.  Muscles Involved:  Quadriceps, hamstrings, glutes, and hip flexors.

Body Alignment:
o  Position yourself on the seat of a leg-press machine.
o  Place your feet flat on the foot plate approximately shoulder width apart.
o  Release the brake of the machine.
o  Grasp the handles of the leg press machine.
o  Brace the transverse abdominals.

Movement:
o Slowly lower the weight so that your knees are bent at a 90- degree angle.
o  Push the weight back to the top pushing through your heels until your legs are almost straight but do not lock your knees.
o  Pause for a second or two.
o  Slowly lower the weight to return to the starting position.
o  Repeat.

Training Tip:

For maximum benefit of this exercise, it is extremely important that you push the weight up through your heels.