Inclusion Criteria:  Age 18 and up Primary unilateral TKA BMI<45 Primary diagnosis of osteoarthritis Patient has a iOS or Android smartphone capable of running FitBit and FocusMotion applications  Exclusion Criteria:  Revision TKA Bilateral TKA Pregnancy Prisoners Pre-existing functionally-limiting neurologic disorder Narcotic dependence, defined as oxycodone/hydrocodone use >5days/week History of unprovoked VTE/PE Inability to complete baseline functional testing