Biomechanics is a scientific physics-based recognition of how the body works during rest and motion. It provides a method of analysing the way a person runs, walks and sits, plus an intimate understanding of the altering bone, joint and muscle positions during these activities.
If the feet tend to roll inwards when walking, then the legs follow by internally rotating and absorbing the shock of heel strike. Conversely if the feet roll outwards, then the legs will externally rotate asking other body areas to absorb weight-bearing forces such as the lower back. These motions can lead to joint arthritis, overuse syndromes and pain.
Treatment of biomechanical problems is first accomplished by recognising postural and structural changes that are causing the body to compensate. This can be as subtle as a stiff big toe joint inhibiting external leg rotation, leading to achy legs or lower back stiffness. Structural compensations can affect various muscles and soft tissue and may cause shin splints, sore feet, knees, hips or lower back, achy legs, nerve and skin conditions.