The remaining 40% of RRIs are caused by anatomical factors, running shoes and training surfaces which independentlyand in combination affect the biomechanical behavior of the foot and the loading of the ankle, knee, hip and lumbopelvis (2,3,4). Approximately 60% of RRIs are caused by training errors which result from doing TOO much, TOO soon with TOO little rest in between training sessions (2,3). * Most running related injuries (RRIs) can be classified as ‘overuse’ injuries which occur from the accumulative loading of the musculoskeletal system beyond it’s capacity to recover and adapt (1). References 1: Running related pain and injury Joe Nimble ‘functional footwear’ is based on this science. A stable foot requires Toe freedom, only functional footwear provides toe freedom. Pain-free movement begins with a stable base of support. Natural function can be restored by regular loading of the feet in footwear that respect natural design of the foot and permit freedom for the toes to spread and stabilise the foot. Toes squashed together by years of wearing narrow shoes that do not respect the natural fan shape of the human foot are common and are linked to instability and movement-related pain. A greater spread of the toes, the great toe in particular, reduces forefoot peak pressures, distributes force more evenly, and stabilises the foot and ankle. Width and stability of the forefoot is crucial in this regard as the highest forces during mid stance occur at the forefoot. Newtonian physics dictates that a wider base of support is more stable than a narrow base. The purpose of the foot is to provide a stable base of support to control the direction of the body weight during the stance phase of locomotion. Noun an activity that is natural to or the purpose of a person or thing.
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