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Relationship between 6MWT speed and A) preferred gait speed (r = 0.79, p < 0.001), and B) fast gait speed (r = 0.82, p < 0.001). Dashed line represents line of identity. Gait speed was faster during the 6MWT compared to preferred gait speed (t = -3.17, p = 0.003), but slower than the fast-pace walk (t = 5.6, p < 0.001).
