en حرکت‌شناسی و آسيب‌های ورزشی Kinesiology and Sport Injuries مقاله اصیل Original Article <div style="text-align: justify;"><span style="font-size:12px;"><span style="font-family:times new roman;"><strong>Background.</strong> Low Back Pain (LBP) is a prevalent phenomenon in athletes and asymmetrical loading on the limbs has been proposed as a risk factor related to this disease.<br> <strong>Objectives. </strong>The purpose of the present study was to compare the asymmetry of loading applied on the legs between men with and without LBP during gait.<br> <strong>Methods. </strong>A total of 40 participants, comprising 20 men with non-specific LBP who practiced martial arts and 20 men without LBP, participated in the study. The participants walked in gait lab and forces applied </span></span><span style="font-size:12px;"><span style="font-family:times new roman;">on</span></span><span style="font-size:12px;"><span style="font-family:times new roman;"> the legs were recorded in three dimensions using a force plate. Also, asymmetry of the forces applied </span></span><span style="font-size:12px;"><span style="font-family:times new roman;">on</span></span><span style="font-size:12px;"><span style="font-family:times new roman;"> the dominant and non-dominant limbs was measured.<br> <strong>Results. </strong>The Asymmetry Indexes (ASI) of the first, second, and third peaks of vertical forces were respectively 3.1%, 3.4%, and 4.1% for normal participants and 4.2%, 4.2, and 2.1 for the participants who had LBP (p>0.05).<br> <strong>Conclusion. </strong>It can be concluded that martial arts athletes with LBP apply symmetrical loads on the lower extremities, similar to healthy people.</span></span></div> Low Back Pain, Asymmetry, Gait, Weight-Bearing 31 36 http://aassjournal.com/browse.php?a_code=A-11-725-1&slc_lang=en&sid=1 Meissam Sadeghisani sadeghi.m@sbmu.ac.ir 10031947532846007089 10031947532846007089 Yes 1Shahid Beheshti University of Medical Sciences, Tehran, Iran. Exercise Physiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran Vahid Sobhani vahedis@tbzmed.ac.ir 10031947532846007090 10031947532846007090 No Exercise Physiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran Hadi Azimi 10031947532846007091 10031947532846007091 No Department of English Language Teaching, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Mohammad Taghi Karimi mohammad.karimi.bioengineering@gmail.com 10031947532846007092 10031947532846007092 No Isfahan University of Medical Sciences, Isfahan, Iran