Crawling is vital to the child prior to standing, so every effort should be made to encourage crawling. Crawling helps the juvenile spine to uncurl from the foetal c-curve position. It helps form the lumber curvature and starts rotating the pelvis into anterior tilt creating a posterior-superior pelvic position. As the infant crawls, the femurs impart an upward force into the acetabula, whilst the sagging abdomen imparts a downward force to the lumbar spine. These two opposing forces direct the pelvis posterior-superior. Upon standing the pelvis should be artificially encouraged to maintain its anterior tilt giving a posterior-superior position.

Subsequent to crawling with the child standing firmly on their feet and the pelvis being superior-anterior, the legs are now ready to be corrected for caster, camber and toe.

The ancient Greeks circa 500BC, employed a man with a cane, a pedagogue, to encourage juveniles to walk with straight feet, i.e. neutral toe.

 This sets the mechanics for precise ambulation, and is also the precursor for setting the spine into an anterior c-curve, total lordosis.

The proposition is that by the end of the growing phase, circa 21 years of age, that the human skeleton achieves a major proportion of the above engineering characteristics such as correct camber, caster and toe, superior anterior pelvis, single spine lordosis with maximum elongation.

Modern cars are mainly front wheel steering and front wheel drive, front wheel steering and rear wheel drive or front wheel steering and four-wheel drive. The modern formula 1 racing car is front wheel steering and rear wheel drive.

As the human body has legs (levers) not wheels, this is rear lever steering and rear lever drive. Similar to cars, the pelvic, leg and foot combination contains the primary suspension, shock absorption,  torsion/sway bar, heave absorber, steering, brakes, power feed, torque and traction control. Further to that, in a car’s steering geometry, the wheels are set for caster, camber and toe.

In the human, the pelvis is a part of the suspension and the pelvic position regulates the caster and influences the toe. The femur and knee positions dictate camber. The human double compound levers or legs, rear lever drive mechanics is seen in some native tribes, but more commonly and easily seen in the world’s top sprinting athletes, 100 and 200 metre runners. Their pelvic tilt is anterior, allowing the pelvis to be posterior superior giving them correct mechanical engineering caster along with toe and natural inbuilt youthful camber. Hence displaying drive,  maximum torque and correct steering geometry, so it’s no wonder they are the world’s fastest runners.

The above explanation clarifies the contentious problem of the pelvic position in human posture.

In the motor vehicle incorrect steering geometry (wheel alignment) results in a decreased performance and excessive, uneven wear of the tyres. It makes sense to say that incorrect human geometry (alignment) also results in decreased performance and excessive uneven wear, often seen in the knee and or hip joint/s. This explains why we are not all the world’s top sprinting athletes, and there are so many knee and hip replacement surgeries.

While our car mechanic and or tyre specialist tells us about our wheel alignment (steering geometry) and tyres, making it more “common knowledge” it’s very difficult to find someone to discuss human mechanical engineering and alignment, nor to book an appointment for a “human alignment” similar to that of a car wheel alignment. Because very few people understand the engineering aspects of our double compound levers, rear lever drive system, most cannot set and align the human body accurately to operate within specific mechanical engineering parameters.