Besides their impressing stature, the Aonikenk had a amazing developed thorax. Their backs were wide and their legs were strong, features that helped them in hunting.
Women were stoutly built, with wide hips, and well proportioned. Some authors suggest that their outstanding white teeth was due to the chewing of the dark fruit of the maqui or molle, a shrub whose sap was used to make incense.
The Aonikenk's adaptation to the harsh climate and weather conditions depended on their physical tributes, on their education, and on a diet that reinforced their defenses. Early in their lives they were trained in withstanding the extreme cold.
As nomad hunters adapted to the Austral climate's harsh conditions they were physically strong and resistant. To keep their body temperature, their organism slowly eliminated the fat, having a different metabolism from contemporary people.