What does it work?
Leg extensions target muscle – Legs – quads
How To Do It
For this exercise, you will need to use a leg extension machine. First, choose your weight and sit on the machine with your legs under the pad (feet pointed forward) and the hands holding the sidebars. This will be your starting position.
Adjust the pad so that it falls on top of your lower leg (just above your feet). Also, make sure that your legs form a 90-degree angle between the lower and upper leg. If the angle is less than 90-degrees then that means the knee is over the toes which in turn creates undue stress at the knee joint.
If the machine is designed that way, either look for another machine or just make sure that when you start executing the exercise you stop going down once you hit the 90-degree angle.
Using your quadriceps, extend your legs to the maximum as you exhale. Ensure that the rest of the body remains stationary on the seat. Pause a second on the contracted position.
Slowly lower the weight back to the original position as you inhale, ensuring that you do not go past the 90-degree angle limit.
Variations: This can also be done one leg at a time