Wrong - The name of this exercise is deceptive. Never allow the front knee to extend over the front foot. Never allow the back leg to remain straight.
Correct - As you go forward, the back knee should bend and move as close to the floor as your range of movement will allow. Keep your back straight and drop down keeping the front knee directly over the front foot when bent. As you return to the beginning of the movement, allow the heel on the back leg to touch the floor. This exercise should be done without holding weights until you feel balanced. To minimize unbalance, you may hold on to a chair until you become used to the movement. Also, it will help balance if you do all the repetitions on one side before doing the other side.
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