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Postural sway in single-legged standing with eyes closed in the plyometric (P), balance + plyometric (PB), and control (C) groups. A, Center of pressure (COP) SD in the medial-lateral (ML) and B, anterior-posterior (AP) directions. C, Maximal COP sway range in the ML and D, AP directions. E, 95% COP sway ellipse area. a P < .005. b P < .05.
