SUMMARY
Purpose. Sit-to-stand (STS) is functionally more critical for the independency of people with osteoarthritis (OA). During STS, OA people experience a lot of pain from high sagittal torque. This study investigated the effect of toe-out (T-O) and toe-in (T-I) on knee adduction moment (KAM) and knee flexion moment (KFM) during STS in moderate knee osteoarthritis (KOA) and healthy age-matched people.
Methods. In this cross-sectional study, 19 volunteers with moderate KOA (KOA group) and 15 age-matched healthy individuals (control group) participated. KAM, KFM, peak times, and terminal knee flexion angle were measured using a motion analysis system during STS in normal foot progression angle (FPA), 10° of T-O, and 10° of T-I. The repeated-measures ANOVA was used to determine the effects of group and FPA condition and their interactions on the knee kinetic and kinematic parameters.
Results. T-I reduced the peak KAM significantly in both groups (p = 0.025 and p = 0.05, respectively). Irrespective of the group, T-O and T-I significantly reduced the peak time of KAM and KFM (p = 0.003 and p = 0.035, respectively). People with KOA had significantly higher terminal knee flexion than healthy subjects in all FPA conditions.
Conclusions. Ten degrees of toe-in reduced KAM in healthy and KOA people during STS; it may effectively diminish the medial knee contact force in people with KOA.
Toe-In during Sit-To-Stand Reduces Knee Adduction Moment in People with Moderate Knee Osteoarthritis
Farniaz Faroughi, Samaneh Gholami, Giti Torkaman
Original Article, 394-401
Keywords: adduction moment, flexion moment., foot progression angle, knee joint, osteoarthritis., sit to stand,
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