Tasical Series Back Extension suna da ƙirar tafiya tare da daidaitacce na baya, kyale mai motsa jiki ya zaɓi kewayon motsi cikin yardar kaina. Ƙunƙarar ƙuƙwalwar da aka faɗaɗa yana ba da jin dadi da goyon baya mai kyau a duk fadin motsi. Dukan na'urar kuma ta gaji fa'idodin Tasical Series, ƙa'idar lever mai sauƙi, kyakkyawan ƙwarewar wasanni.