1. This movement is performed with a dumbbell or a barbell.
2. Stand with a pair of dumbbell in each hand. Be sure to have a straight posture.
3. Keeping your back straight, and your chest thrust out and your head up. Step forward with one foot while the other foot remains on the ground allowing for the heel to come off. Step forward so that your foot is right below your knee at the finish. Push yourself back slowly.
4. Repeat the movement with other foot and so on.

This is a great movement training the front of the thigh. This exercise is really also targets strongly your buttocks. You must remember to keep your chest up and therefore not to lean forward. Also, be sure that your knee does not pass the distance of your foot placing. You can also do this with a barbell where you would place the barbell across the back of your shoulders instead of dumbbells. Also, you can perform this with a smith machine as well, where you can do multiple reps with one leg instead of alternating. Good Luck!