Abstract
Lecture 7 continues the detailed discussion of the working of muscles in relation to the lower limb and goes on to consider balance and the centres of gravity of the human body and its parts.
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Notes
- 1.
Dorsiflexion.
- 2.
Plantar flexion.
- 3.
Bernstein does not account for acceleration due to gravity in the definition of a force in the metric units he uses here. Normally this is discussed in terms of newtons, i.e. one newton is the force needed to accelerate 1 kg of mass at the rate of 1 m per second squared in the direction of the applied force.
- 4.
Of course, even if the center of gravity moves outside the triangle of support, we don’t have to lose balance completely but can regain it. If we are falling forwards we can bend our body forwards, or swing our arms forwards. This results in a temporary backwards force on the whole body after which we can then straighten up. The same in reverse is true if we overbalance backwards (think of the Keystone Cops swinging their arms!).
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Bernstein, N.A. (2020). Lecture 6. In: Biomechanics for Instructors. Springer, Cham. https://doi.org/10.1007/978-3-030-36163-1_7
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DOI: https://doi.org/10.1007/978-3-030-36163-1_7
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