Like the name suggests, ankle straps are a simple gym accessory that wraps around your ankle. The straps tighten around each ankle individually and comes with a hook on the side or back. You can then hook the straps into a machine, like a cable pulley. This allows users to work their legs and abs in different ways and planes, as cable pulleys allow you to move freely. Due to the unique nature of ankle straps, many gym goers prefer to train their legs with them.