The seated leg extension is used to isolate the quadriceps muscles. The quadriceps muscles are located on the front of the thighs. As you might have guessed, there are four muscles that make up the quadriceps. Each muscle works in unison to extend the knee. In everyday life, the "quads" are used when you jump, walk, sit, kick, or stand.

For this exercise, ankle cuffs are recommended. This will ensure that the exercise bands do not ride up your leg as you extend them. First, sit in a chair and place an ankle cuff around each ankle. Loop the bands through the D-ring portion of the ankle cuff and tie a knot. Loop the opposite end of the bands around the chair leg. Next, lift your shoes off the ground a few inches, and then extend the knee until it is completely straight. Slowly return to the starting position and repeat the exercise.

Note: The seated leg extension can be performed with a single or double leg.