Measurement of the maximum knee extension velocity.

(A, B) Experimental setup for measurement. The patient was seated on an elevated bed with a wireless gyro-sensor, where they extended their knee joint five times as quickly as possible from 90°(A) to 160°(B) to hit the soft cushion. (C) The gyro-sensor. (D) Representative data of knee extension velocity. The red arrow indicates the maximum knee extension velocity of five times.</p

Correlations between gait function and knee function (n = 186).

Correlations between gait function and knee function (n = 186).</p

Changes in gait and knee function over time (n = 186).

Changes in gait and knee function over time (n = 186).</p

S1 Dataset -

(XLSX)</p

Multiple linear regression analysis for maximum gait speed and TUG.

Multiple linear regression analysis for maximum gait speed and TUG.</p

Preoperative characteristics of the patients.

Preoperative characteristics of the patients.</p

Experimental setup for measuring the quadriceps muscle strength.

Experimental setup for measuring the quadriceps muscle strength.</p