Abstract

IntroductionAnthropometric changes to the feet with pregnancy may increase risk for musculoskeletal disease. Customized arch-supportive orthoses to prevent anthropometric changes could potentially provide an inexpensive means to prevent musculoskeletal impairments and improve quality of life for women during their post-reproductive years. The objective of this prospective, randomized controlled trial was to determine whether customized foot orthoses can prevent arch collapse during pregnancy. Materials and methodsSeventy-two first trimester women (age 18–40) were randomized to wear either their usual footwear (control) or their usual footwear with custom-molded arch-supportive orthoses. Each participant in the customized orthosis group had orthoses customized by a certified orthotist. Baseline assessments were completed during the first trimester and follow-up assessments were completed approximately 8 weeks postpartum. The primary outcome measurements were static arch height index (AHI), arch drop, arch rigidity index, and center of pressure excursion index (CPEI). ResultsThere were no statistically significant differences in the change in static foot structure or dynamic arch function between baseline and follow-up within either group. Comparing the customized orthosis and control groups, no significant differences were detected in change in AHI sitting (p=.44), AHI standing (p=.48), arch drop (p=.67), arch rigidity (p=.68) or CPEI (p=.77). ConclusionsThere was no difference in arch change when comparing women who were randomized to wear customized orthoses or self-selected footwear. The finding of no arch drop in either group may indicate that both groups supported their arches during the study period or that neither group was predisposed to lose arch height with pregnancy.

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