Effect of the application of a metatarsal bar on pressure in the metatarsal bones of the foot

Purpose] The aim of this study was to determine the effect of application of a metatarsal bar on the pressure in the metatarsal bones of the foot using a foot analysis system (pressure on the forefoot, midfoot, and rearfoot). Subjects and Methods] Forty female university students in their twenties were selected for this study, and an experiment was conducted with them as the subjects, before and after application of a metatarsal bar. The static foot regions were divided into the forefoot, midfoot, and rearfoot, and then the maximum, average, and low pressures exerted at each region were measured, along with the static foot pressure distribution ratio. 1) Static foot pressure: The tips of both feet were aligned to match the vertical and horizontal lines of the foot pressure measuring plate. The subjects were told to look toward the front and not to wear shoes. 2) Distribution ratio: The distribution ratio was measured in four regions (front, back, left, and right) using the same method as used for static foot pressure measurement. Results] The results of this study showed that the maximum, average, and minimum static pressures in the forefoot were significantly decreased. The minimum static pressure in the midfoot was significantly increased, and the pressure in the other parts was significantly decreased. The maximum and average static pressures in the rearfoot were also significantly decreased. Conclusion] As reduction of foot pressure with a metatarsal bar results in lowering of the arch and an increased contact surface, the foot pressure was dispersed. These results suggest that wearing shoes with a bar that can decrease the foot pressure is therapeutically helpful for patients with a diabetic foot lesion or rheumatoid arthritis.Key words: Foot pressure, Distribution ratio, Metatarsal bar