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Immediate and temporary effects of the spike insoles (i.e. 5 min) in the standing session. Left and right panels represent the evolution of the CoP surface area, mean speed, AP and ML RMS for the young adults and the elderly, respectively (means and SD). Refer to text to see significant effects or interactions. For illustration purposes, the ordinate scale of the graphs has been adapted so that its amplitude remains the same for the two populations
