Relationships between the Amount of Physical Activity and Physical Function, Pain and Catastrophizing after Total Knee Arthroplasty

Abstract

[Purpose] This study examined the relationship between the amount of physical activity and physical function, pain and catastrophizing after total knee arthroplasty (TKA). [Subjects and Methods] The subjects were 31 knees of 31 patients. Physical activity, knee extensor strength, 5-time chair-standing test (SS-5), the Timed Up and Go test (TUG), pain, and catastrophizing were evaluated at 4 weeks after TKA. [Results] Significant correlations were found between physical activity and knee extensor strength, SS-5, and TUG. No significant correlations were found between physical activity and pain and catastrophizing. [Conclusion] The results suggest that physical activity is related to physical function at 4 weeks after TKA.