During teaching different kinds of aptitude are taken into consideration, focusing especially on differences in morphology. Although women have better flexibility, muscular protection is also less well assured, the bones are generally thinner and more fragile, and there are more risks concerning the articulations than for men. As a result, the practitioner’s concentration, and the pursuit of aesthetics and self-control are highly important elements of women's taekwondo. When learning free-sparring women are required to wear all appropriate forms of protection (helmet, chest guard, groin guard, forearm and shin guards, and hand and foot protectors).