How to choose heeled shoes over 15cm can be high difficult to do. Here are some tips.
Main Tip: When buying shoes with heels over 15 cm it is good to choose a number higher than what you normally wear. Want to know why? Continue reading…(some mathematical knowledge is needed).
Figure 1 shows a medium-sized female foot(dimensions in centimeters). When using high heels, usually a good part of the weight of the body concentrates on the toes of a foot of 7,62 cm as shown in figure 2.
When you use a shoe with a 12cm heel, for example, the projection of the foot curve is 8.5cm(applying the Pythagorean Theorem in figure 3 to the triangle BDC). Already for a jump of 15 cm this projection would be reduced to zero because practically would be equal to the curve of the foot. The woman would stand with her foot at an angle of 90 degrees, as shown in figure 4.
The ideal size of the jump is 12 cm, as shown in figure 5. For heels with heights greater than this, there will always be an empty space under the “ball of the foot” as well as in the heel, as shown in figure 6. This Occurs because the distance”a”, between the point of the jump and the “ball of the foot”, must have a minimum of 8 cm.
Check figure 8, below, for how the arch of the foot is 90° when we use a jump with a height of 15 cm or greater.
Is there a formula for calculating the heel height of women’s shoes? Yes there is. This formula was developed by Professor Paul Steveson of the University of Surrey, England. The maximum height of the jump takes into account the size of the shoe and an F factor that represents what Steveson calls the”sociological factor”. This factor represents, for example, the degree of tolerance to pain and discomfort that a woman is capable of withstanding.
H=maximum heel height(in cm)
F=sociological factor ranging from 0 to 1
s=shoe size(size of shoes with UK numbering)
An interesting fact: The pressure exerted by each foot of a woman weighing 46 kg and wearing shoes with stiletto heels is 20 times greater than the pressure exerted by each of the legs of an elephant of 2750 kg. This is what can be called truly fatal heels.
Partial font: Alternative Lifestyle
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