Table 1.

Maximal knee joint angle reached during the stepping-down performance of the leading leg and of the supporting leg during the swing phase.

Maximal knee joint angle
Leading leg	Controls	Patients before surgery	Patients after surgery
Right / Sound	45.4° +/-4.7	49.2° +/-10.5	58.3° +/-23.4
Left / arthritis / operated	46.2° +/-7.3	33.7° +/-14	40.9° +/-12
Supporting leg	Controls	Patients before surgery	Patients after surgery
Right / Sound	79.9° +/-10	81.2° +/-6.3	67.3° +/-29.1
Left / arthritis / operated	82.7° +/-4.4	55.3° +/-14	52° +/-21.2