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Ability of step- and count-based monitors to differentiate across activity bouts: (A) SAM steps; (B) AC steps; (C) AC activity counts; (D) AH activity counts. a=significantly different from low activity (p<0.01); b=significantly different from longer duration activity (p<0.01); c=significantly different from walk test (p<0.01); d=significantly different from sedentary behavior (p<0.01).
