AB1796-HPR ALTERED ANKLE AND KNEE MUSCLE ARCHITECTURE AND FOOT PRESSURE DISTRIBUTION IN KNEE OSTEOARTHRITIS PATIENTS: A COMPARATIVE CROSS SECTIONAL STUDY

Background Osteoarthritis (OA) of the knee is a common degenerative and chronic disease as well major cause pain functional disability. Alterations in lower extremity biomechanics may lead adaptive changes walking, foot pressure distribution, muscle strength architectural characteristics ankle muscles patients with OA. Objectives The aim this study was to compare architecture distribution differences OA healthy individuals. Methods Twenty (mean age= 53.35±1.21 years, mean BMI=31.69±0.93 kg/m2) twenty controls 51.05±0.63 BMI=29.28±1.15 were included study. Rectus Femoris (RF), Vastus Medialis (VM), Peronalis Longus (PL) Medial Gastrocnemius (MG) thickness, pennation angle fat thickness evaluated using B-Mode ultrasonography (Esaote MyLab X8 eXP Ultrasound System, Florence, Italy). images analyzed offline an image analysis software (Image J, National Institutes Health, Bethesda, MD, USA) program. Plantar Digital Biometry Scanning System Milletrix (DIASU, Mann-Whitney U test used Results age (p=0.189) BMI (p=0.367) comparable between groups. RF, VM, PL MG different groups (Table1). parameters altered compared Conclusion higher controls. Clinicians should consider adding aerobic resistance exercises their treatment programs that will increase decrease thickness. medial load increased while lateral these patients. supported insoles be recommended reduce on foot. References [1] Aily JB, de Noronha M, Almeida AC, et al. Evaluation vastus lateralis extensors middle-aged older individuals osteoarthritis. Clin Rheumatol. 2019;38(9):2603-2611. [2] Karapinar Ayyildiz VA, Unal Firat T. Effect intramuscular thigh physical performance women J Orthop Sci. 2022; S0949-2658(22)00324-4 Table 1. Muscle among Parameters Group (n=20) median (IQR) Healthy p RF Fat (cm) 1.4 (1-2.2) 1.05 (0,6-1.5) 0.001* 1.8 (1.3-2.8) 2 (1.5-2.9) 0.211 Pennation (°) 12 (8.7-18.2) 12.8 (10.3-17.5) 0.341 VM (0.8-2.1) 0.9 (0.6-1.8) 1.7 (1.4-2.8) 1.9 (1.3-2.6) 0.048* 11.6 (7.2-16.9) 13.4 (10.1-19.6) 0.046* 0.8 (0.6-1.1) 1 (0.6-1.3) 0.007* 11.1(7.2-15.7) 10.6 (8.6-16.6) 0.296 (0.7-1.6) (0.6-1.6) 0.005* (1.3-2.5) (1.2-2.4) 0.398 20.6 (15.2-23.3) 21.6 (17.8-28.2) 0.221 Foot Pressure Distribution Total surface area (cm ) 265.2 (186-331.2) 224.1 (143.2-350) 0.050 (kg) 39.7 (25.2-52) 32.2 (22.4-62) 0.009* 18.3 (12.8-25.8) 15.6 (11.3-31.5) Lateral 16.6 (12.3-28) (11.1-30.5) 0.008* 8.1 (2.6-16.7) 10.5 (4.9-14.6) 0.043* progression angle(°) 9.3 (0.7-27.9) 11 (1.5-17.9) 0.134 OA: Osteoarthritis, RF: Rektus Femoris, VM: Medialis, PL: longus, MG: Gastrocnemius, IQR: interquartile range *p<0.05 Acknowledgements: NIL. Disclosure Interests None Declared.