"traditional"
A greater range of motion in the legs is obviously desirable for the runners but athletics seem to be one of the few areas of sports where experimentations in what to wear have not been undertaken (or have they ?)
I am thinking of earlier posts where the aerodynamics of divers and the speed advantage of swimmers in certain fabrics have been debated (not to mention the changes we have seen in such events as the luge and slalom snow skiing)
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