Biomechanics

A Guide to Lower Limb Functional Biomechanics


Humans are the sole species on this planet that walk in an erect, bipedal fashion. Over the course of the last four million years, our musculoskeletal structure has gradually evolved to achieve its present status.
Feet are essentially the foundation for the rest of the body and are literally pivotal in allowing us to walk more efficiently.
Biomechanics is the study of human mechanics, examining the forces acting upon and within a biological structure and the effects of such forces.
Podiatric biomechanics is the evaluation and observation of the structure and function of the lower limb and foot.
Many common complaints can be related to biomechanical dysfunction (as a result of poor posture in the foot and leg).

Due to the nature of our musculoskeletal make up, it is essential to observe and assess the foot and lower limb simultaneously.
The biomechanics are mutually dependent, subsequently if there is a mechanical problem with our feet it can have a profound effect on structures it supports and vice versa.
e.g knee injuries, influence the leg to foot angle and subsequently foot function.
Leonardo DaVinci (1452-1519)
“The foot is the most marvellous of machines and a work of art”
Feet are essentially the bodys foundation. As with any foundation, a small imbalance can result in severe problems in the rest of the structure
Consider foot alignment to that of the wheel alignment of a car. A car, which has an unbalanced wheel alignment, cannot develop any real speed in their line of movement because the wheels are not balanced with respect to the direction of their movement. Every turn of an unbalanced wheel leads to abnormal wear and tear and so limits the proficiency and efficiency of the Car. (Diagram 1) A bit of a bumpy ride!

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