en علوم ورزشی Sport sciences پژوهشي Original Research Articles <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Tahoma;"><span style="line-height:2;"><strong>Objectives</strong>: To comprehend the kinematic effects of hallux valgus (HV) deformity on young and older people, we assessed the angular acceleration of the joints in the lower limbs of these women.&nbsp;<br> <strong>Methods</strong>: Forty-eight women in two groups, young adults (20-30 years old) and older adults (50-60 years old), participated in this study (12 healthy and 12 with HV). We used an inertial measurement unit&nbsp;(IMU)-based motion capture system to measure the kinematics of motion. Biomechanical variables were assessed at an ideal speed during gait (stance and swing phases). All modules were calibrated in advance and then attached to the right thigh, shank, and foot.&nbsp;<br> <strong>Results</strong>: The results showed that in the young group, angular acceleration was significantly different during gait in all planes of the ankle joint, the sagittal plane of the knee joint, and the horizontal and frontal planes of the hip joint. In the older group, it was significantly different in the sagittal plane of the ankle and knee and the sagittal and frontal planes of the hip joint.<br> <strong>Discussion</strong>: It appears that the angular acceleration of the lower limb joints was affected by HV, especially in the young group. Additionally, the angular acceleration of the knee joint was less affected in both groups.</span></span></span></div> Hallux valgus (HV), Angular acceleration, Lower limb, Gait, Older women 691 700 http://irj.uswr.ac.ir/browse.php?a_code=A-10-2180-1&slc_lang=en&sid=1 Samaneh Sardary keyhan.athlete@yahoo.com 0009-0005-4040-0759 No Department of Sports Biomechanics, Faculty of Physical Education and Sports Science, Central Tehran Branch, Islamic Azad university, Tehran, Iran. Farhad Tabatabai Ghomsheh tabatabai.uswr@gmail.com 0000-0002-0754-0814 Yes Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Hamid Reza Norouzi Norouzihr@gmail.com 0000-0003-1094-2168 No Department of Sport Sciences, Faculty of Humanities, University of Zanjan, Zanjan, Iran. Ali Fatahi ali.fatahi@iauctb.ac.ir 0000-0002-8863-4061 No Department of Sports Biomechanics, Faculty of Physical Education and Sports Science, Central Tehran Branch, Islamic Azad university, Tehran, Iran.