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Walking on air |
Walking on airAn interesting research letter published in The Lancet for April 7 from Harvard describes the result of experiments involving 20 healthy women who wore dress shoes with wide heels and narrow heels. The object was to determine whether wide-base shoes were more or less likely to produce osteoarthritis of the knee than those with narrow heels, a matter in which there are conventional answers. Contrary to general belief, walking in broad-heeled shoes causes as much, if not greater, increase in knee torques as does walking in shoes with narrow heels. It has to be recognised, however, that walking on broad heels may well reduce the risk of falls, ankle injuries and deformities of the feet, compared with those associated with narrow high heels. It is concluded that wide heels create abnormal forces across the patello-femoral and medial compartments of the knee, which are typical sites for those degenerative changes in the joint that result in osteoarthritis. |