Outdoor Gym Equipment Back Extension

Back Extension at Outdoor Fitness. The Back Extension equipment strengthens the lower erector spinae muscles of the lower back, as well as the gluteus and hamstring areas. This will also have the effect of improving posture and stability.A back extension bench, often called a back extension machine, uses gravity as resistance. It requires you to face the floor with your thighs on the pad, letting your spine extend upward. Also known as a hyperextension bench, this equipment comes in two versions: 45 degrees and 90 degrees.The leg extension, or knee extension, is a type of strength training exercise. It's an excellent move for strengthening your quadriceps, which are in the front of your upper legs. Leg extensions are done on a leg extension machine. You sit on the machine with a weighted pad on top of your lower legs.