Mean ± SD interlimb symmetry ratio of peak external knee flexion moment, reflective of knee extensor torque requirements, during sit-to-stand for the symmetry group (pre-TKA, 3 months post-TKA, and 6 months post-TKA; n = 11) and standard-of-care group (6 months post-TKA; n = 11). Symmetry ratio was calculated as the peak external knee flexion moment on the surgical limb divided by the peak external knee flexion moment on the nonsurgical limb. Abbreviation: TKA, total knee arthroplasty.