Patients who participated in regular physical activity after undergoing total knee arthroplasty experienced improved satisfaction with their outcomes, according to study results. Researchers evaluated physical activity profiles of 369 patients before and after total knee arthroplasty (TKA) using a questionnaire that contained the University of California — Los Angeles activity scale and types of sports activities. Using subgroup comparisons and partial correlation analyses, the researchers assessed the associations of socio-demographic features and postoperative functional outcomes with the physical activity levels, as well as the effects of regular physical activity on patient satisfaction with replaced knees. Both before and after TKA, study results showed the three most common sports activities were walking, swimming and bicycling. Although the mean activity level remained similar after TKA, the frequency of moderate activity levels and moderate types of physical activities increased, according to the researchers. The researchers also found higher postoperative activity levels reported by patients with higher postoperative function scores. However, socio-demographic factors were not associated with activity level. Overall, greater patient satisfaction was associated with regular physical activity.