One can, usually will develop incorrect posture, gait and and walking form if they are nutritionally deficient and/or have toxic overload. Deficiency and toxicity create deformities and developmental problems either from birth (nutrition and toxicity of the parent) or from diet and environmental exposures during development and throughout one’s life that the body compensates for.
Another component is how a parent “allows” a child to develop. Putting a child in a Jolly Jumper rather than forcing the child to find their way to upright on his own in in his own time. It creates lifelong developmental weakness but can be corrected by going back to the basics of corrective primal exercise supported by enhanced nutrition.
More: Book – Nutrition and Physical Degeneration by Weston A. Price