Spartan bow: this quads exercise( from "Spartan" series ) is perfect for improving the stability of the legs. This exercise is very different from the "squat" with one leg, in fact in this release is necessary to have a perfect balance. Be always in shape! Join US! Subscribe P4P - http://www.dailymotion.com/passion4profession/ Facebook - http://www.facebook.com/pages/Passion4Profession-Inc/123267949096 Twitter - https://twitter.com/#!/P4P_Inc !