Skip to main content

Table 3 Isokinetic and isometric parameters (mean ± SD) between groups before and after TKA

From: Better quadriceps and hamstring strength is achieved after Total knee Arthroplasty with single radius femoral prostheses: a retrospective study based on isokinetic and isometric data

velocityparametersPreoperativePostoperative
MR groupSR groupP valueMR groupSR groupP value
180°/sPeak knee flexion torque (N.m)17.45 ± 8.3519.13 ± 5.670.49825.25 ± 9.9739.50 ± 19.200.014
Peak knee extension torque (N.m)23.60 ± 15.9526.94 ± 8.340.45438.05 ± 17.0754.88 ± 28.290.034
H/Q ratio0.81 ± 0.200.73 ± 0.160.1770.77 ± 0.420.74 ± 0.150.809
Maximum knee flexion work (J)15.30 ± 3.1617.44 ± 7.460.01819.95 ± 8.6130.75 ± 14.720.016
Maximum knee extension work (J)19.60 ± 6.8323.63 ± 8.630.12736.80 ± 19.3350.25 ± 26.660.088
Average knee flexion power (W)20.75 ± 10.0426.63 ± 12.180.12228.95 ± 17.6044.38 ± 33.070.106
Average knee extension power (W)32.45 ± 11.1435.88 ± 13.150.40355.40 ± 31.9670.13 ± 52.310.305
60°/sPeak knee flexion torque (N.m)32.90 ± 9.6136.31 ± 11.610.80232.70 ± 11.0449.3 ± 23.660.017
Peak knee extension torque (N.m)47.40 ± 21.3859.69 ± 19.660.08552.75 ± 25.0576.31 ± 34.960.032
H/Q ratio0.60 ± 0.250.63 ± 0.340.6890.76 ± 0.460.67 ± 0.170.421
Maximum knee flexion work (J)34.95 ± 8.9934.19 ± 10.930.46828.15 ± 10.0142.38 ± 16.550.006
Maximum knee extension work (J)46.45 ± 21.8560.38 ± 18.950.05252.05 ± 28.4870.50 ± 28.890.063
Average knee flexion power (W)15.35 ± 5.8917.56 ± 6.020.27518.75 ± 8.6836.31 ± 25.850.018
Average knee extension power (W)31.70 ± 5.6833.19 ± 9.790.72835.15 ± 24.8660.81 ± 42.460.043
Isometric contractionKnee flexion torque (N.m)36.75 ± 12.6740.81 ± 12.800.34851.00 ± 19.7470.38 ± 37.760.077
Knee extension torque (N.m)49.00 ± 18.9552.62 ± 18.070.03657.90 ± 28.6994.69 ± 46.380.011
  1. SD standard deviation, TKA total knee arthroplasty, SR single radius, MR multiple radius, H/Q hamstring/Quadriceps