Iranian Journal of Ergonomics

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Introduction: Foot anthropometric dimensions could be useful in designing comfortable footwear. The objective of this study was the measurement of foot anthropometric dimensions in a group of students.

Methods: This was a descriptive study in which 21 dimensions of foot for 580 males and females were measured manually. To measure the foot dimensions, a digital caliper and a tape were used. The measured dimensions included the important lengths, widths, heights and girths of foot. Descriptive statistics such as percentiles, mean and standard deviation were calculated for the collected data. To test and survey of the mean of foot dimensions between males and females, statistics such as independent t-test and effect size (Cohen’s d) were used.

Results: The values of mean, standard deviation, the 5th, 50th, and 95th percentiles were calculate and tabulated for the total studied population and for gender. In all measured foot dimensions, males had bigger dimensions than females. Gender had different impacts on the measured foot dimensions. The mean of all foot dimensions was significantly different between males and females (P value = 0.001). Digital pattering of I and II were observed in 78% and 22% of the studied population, respectively.

Conclusions: In the present study, important anthropometric data of foot were collected for a group of students. The presented percentiles could be used in design of male and female shoes. Conducting similar studies in children with different age categories could help completion of the anthropometric database.

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Introduction: The aim of this study was to evaluate the effect of unstable shoes on lower limb kinetic parameters of walking in healthy male students with different geometric shapes. Today, various shoes have been developed to reduce the effects of injury parameters and improve performance parameters for walking.
 
Methods: 20 of the healthy male lambs were selected 178.96 ± 3.92 cm, 27 ± 3 years old, 73.99 ± 6.6 kg and 42 (EU) number, in four position, domestic production unstable shoes , foreign Similar unstable shoes, regular control shoes, and barefoot, The Kinetic parameters associated with Lower limbs was evaluated by force plate while walking. To examine the significant statistical differences between dependent variables between the four conditions of foot cover, the general linear model and the analysis of variance with repeated data and / or Friedman in the case of normalization of data in the alpha level of 5% using software version 23 SPSS was used.
 
Results: In relation to the kenetic parameters of the lower extremity, there was no change in the peak Postereior Force and the peak active force in the case when there was a significant change in the peak passive force and  peak anterior Force and and the free movment and loading rate.
 
Conculosion: The results indicate to the domestic production unstable shoes inefficiency  in reducing the damage and increasing the comfort of the lower limbs.