your shoulders like you would if you were doing Barbell Squats.

[mithaljonson]

Step up onto a flat bench with your left leg. Then step up with your right leg so you are now standing on the bench. Step down with your left leg, then your right leg. Repeat, starting with your right leg this time. Be careful not to fall! Use lighter weights.  Formula 41 Extreme Can also be done with two dumbbells in your hands instead of a barbell.Quadricepsumbbell lungesPlace a barbell on your shoulders like you would if you were doing Barbell Squats. Step up onto a flat bench with your left leg. Then step up with your right leg so you are now standing on the bench. Step down with your left leg, then your right leg. Repeat, starting with your right leg this time. Be careful not to fall! Use lighter weights. Can also be done with two dumbbells in your hands instead of a barbell.eg extensionUsing a leg extension machine, sit in the seat and hook your feet under the padded bar. Adjust the pad and/or the seat so that your knees hang off the end of the seat and the footpad rest on the lowest part of the shins.  http://www.strongmenmuscle.com/formula-41-extreme/