Improper body position implies the lack of the use, or the incorrect use, of groups of muscles which are necessary for the maintenance of the erect attitude. The causes of this condition are many, but they will not be considered in this paper.
In the correction of improper body position, one must obtain all or several of the following: (1) inversion of the feet, (2) extension of the knee, (3) extension of the hip, (4) reduction of the lumbar lordosis, (5) extension of the dorsal spine, (6) elevation (which also means widening) of the thoracic cage, (7) straightening of the cervical spine and (8) leveling of the head.
I cannot now consider the mechanical problems concerned in these readjustments. The general problem is to bring into proper action the antigravity muscles so that the body may be erect, the vital organs may function correctly, and there may not be an
HAYNES RS. POSTURAL REFLEXES: IN RELATION TO THE CORRECTION OF IMPROPER BODY POSITION. Am J Dis Child. 1928;36(6):1093–1107. doi:10.1001/archpedi.1928.01920300002001
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