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The balance assessment contains three different foot positions on a flat hard surface (side-by-side (a), semi-tandem (b), tandem (c)) and a condition on a balance mat (black outline) in a semi-tandem stance with eyes open (d) and closed (e). The acceleration traces in the horizontal plane (medio-lateral (M/L) and anterior-posterior (A/P) directions) for one representative participant are shown under each balance condition.
