With a small, advanced brain, long arms, long legs and an advanced pelvis, Australopithecus sediba is described as probably a transitional species between Australopithecus Africanus and Homo habilis.

Core strength training mainly aims at the training of the entire torso and pelvis muscles, especially the deep small muscle groups.

This had a skeleton much like modern man's—a big, brain-filled skull and a narrow pelvis and rib cage, which imply a small abdomen and thus a small gut.