2. Kyushu University of Nursing and Social welfare Graduate School, Japan.
Background and purpose: In a clinical setting, patients with hip osteoarthritis often complain of trunk instability during the gait, therefore, this study aims to determine the characteristics of left and right internal oblique muscle activities during walking in healthy individuals and patients with hip osteoarthritis (OA).
Methods: Participants included 17 healthy males and 10 (2 males and 8 female) with hip OA. The characteristics of muscle activity in one walking cycle were compared using integrated EMG analysis (% IEMG) and co-contraction index (CCI), which is an index of simultaneous muscles.
Results: The %IEMG and CCI values were greater and less, respectively, in patients with hip OA than in healthy individuals.
Conclusion: It is important to increase the CCI of the left and right internal oblique muscles to improve the trunk stability during walking in patients with hip OA.
Keywords: Inner oblique muscle, Hip osteoarthritis, Co-contraction index