Abstract
BackgroundPhysical activity is associated with physical function; however, the relationship between early physical activity after total knee arthroplasty (TKA) and postoperative physical function remains unclear. The purpose of this study was to evaluate the association of early physical activity after TKA with postoperative physical function.MethodsTimed Up and Go test (TUG) of 47 patients was assessed preoperatively and at 10 days, 3 months, and 6 months postoperatively. Physical activity from the second to the ninth day after TKA was measured with accelerometer, and the correlation with pre- and postoperative physical function was evaluated . A multiple linear regression was used to predict TUG at 6 months after TKA.ResultsPostoperative physical activity correlated with preoperative TUG (ρ = −0.485, p < 0.001), TUG at 10 days (ρ = −0.675, p < 0.001), 3 months (ρ = −0.441, p < 0.01), and 6 months (ρ = −0.368, p < 0.05) after surgery. Multiple linear regression indicated that only the preoperative TUG was associated with TUG at 6 months. Postoperative physical activity was not an independent factor predicting TUG at 6 months after TKA.ConclusionOur study demonstrated that patients with better physical function have higher physical activity in the early postoperative period, whereas it does not affect physical function at 6 months after TKA. In the early postoperative period, increasing physical activity may not always be necessary to improve postoperative physical function. We also confirmed that preoperative physical function affects postoperative physical function. These findings may be beneficial in improving rehabilitation programs in the early postoperative period.
Highlights
Physical activity is essential for decreasing the risk for mortality, chronic diseases, and lifestyle-related diseases [1, 2]
Timed Up and Go test (TUG) at 10 days after total knee arthroplasty (TKA) was significantly slower than baseline values; it was significantly improved at 3 months compared with baseline values
knee extensor strength (KES) on the involved side at 10 days and 3 months after TKA significantly decreased compared with baseline values, it recovered to the preoperative values at 6 months
Summary
Physical activity is essential for decreasing the risk for mortality, chronic diseases, and lifestyle-related diseases [1, 2]. Taniguchi et al [7] have reported that postoperative physical activity up Takamura et al Knee Surg & Relat Res (2021) 33:35 to 6 months was a significant predictor of improvement in Timed Up and Go test (TUG). It remains unclear whether early postoperative physical activity is associated with the improvement in postoperative physical function patients stay in the hospital for a few days after TKA. The purpose of this study was to clarify the association of early physical activity after TKA with postoperative physical function. The purpose of this study was to evaluate the association of early physical activity after TKA with postoperative physical function
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