Hyperextension W522 is a special back muscle strengthening machine designed for outdoor use. The machine is made of durable and frost-resistant steel and is powder-coated to provide resistance to corrosion and dirt. It has built-in ergonomic elements such as an adjustable headrest, leg support and torso platform, which ensures comfortable and effective hyperextension exercises. The W522 machine is ideal for arranging sports grounds in parks, squares or outdoor sports complexes.