Illustrate and animate foot movement (bone anatomy)

This project was awarded to BlackSmithyX for €175 EUR.

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Project Description

I'm looking for someone who can make a couple of pictures cleaner and also to animate them from a scratch of foot bone anatomy. I'll require you to know basics of foot bone anatomy and to be able to figure out what happens when foot hits the ground. We have two kinds of steps. They are briefly explained below. You will have to be able to know muscles and how they react on different kind of movement. I'll only require 2d animation, but it must be pretty. I will also be needing still photos from all these three phases of both ways of stepping. More info in pm if wanted.

1. An optimal step exercise:

I. The ball of the foot makes contact with the surface with toes flexed up.

This way the flexor muscles of the sole of the foot, toes and ankle are maximally activated as the ball of the foot makes contact with the surface.
In this position, it is almost impossible to strain the ankle since the supporting tension of the muscles is so strong that it locks the ankle to an optimal supination/pronation position.

II. As the weight of the body moves over the foot, the toes straighten.

The entire sole makes contact with the surface but the ball of the foot area has the strongest contact. The contact with the surface and information gained from it (surface contour, slipperiness) is transmitted to the brain before the weight is on the foot completely.

III. In the thrusting phase, the ankle and knee straighten effectively.

When the ankle is in the optimal position throughout the entire step, the power of the thrust is maximal and extends from the hip area to the back and further all the way to the neck through the correct kinetic chain. The calf muscles and the Achilles tendon are aligned. The correct position of the leg does not put a strain on the knee area.


2. Heel-first stepping is wrong?

In the traditional way of walking, formed by footwear, the foot adjusts to heel-first stepping because of the shoes. Wearing shoes has made our feet very passive.

I. The heel makes contact with the surface first when the foot is moved forward.

The shock is transmitted throughout the entire body. The pressure caused by this burdens the discs of the back and joints, and it is felt in the entire kinetic chain. Naturally, the heel of the shoe dampens the shock but at the same time, it hinders or delays the contact of the ball of the foot with the surface if the heel of the shoe is even slightly higher than the ball of the foot. Even the slightest increase in the heel height makes toe flexors passive, resulting in minimal pre-tension.

II. The weight of the body moves via the outside of the foot to the ball of the foot and, further, over the entire area of the foot, causing the ankle to pronate.

This motion is generally considered to be a mechanism for absorbing shock. However, the spring provided is so minimal that this action is not sufficient to absorb the shock, because when the heel touches the surface, the actual impact has already taken place.

III. In the thrusting phase, the weight of the body moves completely on the ball of the foot.

When the ankle continues to be over-pronated, the joints of the foot become overstressed too. When thrusting, the kinetic chain is incorrect and weak, resulting in stress injuries of the Achilles tendon and calf muscles (gastrocnemius). It is not until at the end of the thrusting motion that the toe flexors are maximal.

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