I propose that if our most recent ancestor came out of Africa, he was hairy and with little bend in the waist as shown in the below image (second from left).
He was as hairy as any other great apes of the time. His vertebral column was not S-shaped as of us and had bend in waist.
The following anatomical information in Wikipedia is about us and not about our most recent ancestor who exited Africa 200K ago or 5million years ago.
WIKIPEDIA:
Anatomically the evolution of bipedalism has been accompanied by a large number of skeletal changes, not just to the legs and pelvis, but also to the vertebral column, feet and ankles, and skull. Perhaps the most significant changes are in the pelvic region, where the long downwards facing iliac blade was shortened and became wide as a requirement for keeping the center of gravity stable while walking. The shortening and narrowing of the pelvis evolved as a requirement for bipedality and had significant effects on the process of human birth which is much more difficult in modern humans than in other primates. The femur evolved into a slightly more angular position to move the center of gravity towards the geometric center of the body. The knee and ankle joints became increasingly robust to better support increased weight. Also in order to support the increased weight on each vertebra in the upright position the human vertebral column became S-shaped and the lumbar vertebrae became shorter and wider. In the feet the big toe moved into alignment with the other toes to help in forward locomotion. The arms and forearms shortened relative to the legs making it easier to run. The foramen magnum migrated under the skull and more anterior.
[Pic sourced from blog.enn[dot]com removed by Admin because it was giving Malware alert in some browsers]