2007, Piran, Slovenia
2007, Piran, Slovenia 2007, Piran, Slovenia
Environmental Ergonomics XII Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana 2007 In the present subject population, 10% had a length difference between left and right foot greater than 6 mm, which is one EU size number. 484 Figure 4: Foot length difference left/right Figure 5 shows foot length data versus foot width data, which demonstrates the existence of a considerable variation of foot width in the same foot length class. 120 115 110 105 width 100 95 90 85 80 12 10 8 6 4 2 0 10 Number of soldiers 10 6 5 3 1 2 3 4 5 6 7 8 9 1 2 Figure 5: Foot length versus foot width 1 1 Length difference [mm] 4 5 1 1 2 1 230 240 250 260 270 280 290 300 310 320 length 1 1
Modelling The line through the data points represents the mean width values of individual length classes. Thus, for example, in the 270 mm length class, the width variation is from 90 mm up to 113 mm, which is more than 20% of the average value. Figure 6 shows the difference between left and right foot widths for the same individuals. Despite the apparently small differences, nearly 20% of subjects had a difference of 3 mm or greater. 25 20 15 21 Number of soldiers 10 5 0 11 6 2 Figure 6: Difference between left foot width and right foot width for the same individual DISCUSSION There were notable differences between left and right foot lengths and widths in the present subject population. The present results suggest that at least three shoe width classes of 4-6 mm should be manufactured for each length class to offer optimal foot-shoe fit for approximately 95% of the subjects in the present sample. ACKNOWLEDGEMENTS This study was funded by a Knowledge for Security and Peace grant administered jointly by the Ministries of Defence, and of Science (Republic of Slovenia). The assistance of Alpina d.d. is gratefully acknowledged. 1 2 1 1 1 2 3 4 5 6 7 8 Width diference left/right [mm] 485
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Environmental Ergonomics XII<br />
Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana <strong>2007</strong><br />
In the present subject population, 10% had a length difference between left and right foot<br />
greater than 6 mm, which is one EU size number.<br />
484<br />
Figure 4: Foot length difference left/right<br />
Figure 5 shows foot length data versus foot width data, which demonstrates the existence of a<br />
considerable variation of foot width in the same foot length class.<br />
120<br />
115<br />
110<br />
105<br />
width<br />
100<br />
95<br />
90<br />
85<br />
80<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
10<br />
Number of soldiers<br />
10<br />
6<br />
5<br />
3<br />
1 2 3 4 5 6 7 8 9 1<br />
2<br />
Figure 5: Foot length versus foot width<br />
1<br />
1<br />
Length difference [mm]<br />
4<br />
5<br />
1<br />
1 2 1<br />
230 240 250 260 270 280 290 300 310 320<br />
length<br />
1<br />
1