836 September, October 2021 Vol 10. Num 4 Extended Absract 1. Introduction t is clear that the risk of disease increas- es in old age, and the ability to function decreases. Back pain is one of the mos common musculoskeletal disorders that is more common in the elderly with a sedentary lifesyle. Back pain reduces the level of physical activity in daily life, leading to a decrease in the level of physical ftness, resulting in more disability and chronic low back pain. One of the mos critical factors that may cause back pain in old age is changes in body composition, including an in- crease in body fat mass, especially abdominal fat, and mus- * Corresponding Author: Solmaz Babaei Bonab, PhD. Address: Department of Sports Sciences, University of Maragheh, Maragheh, Iran. Tel: +98 (914) 3215066 E-Mail: s.babaei@maragheh.ac.ir Research Paper: The Efect of Eight Weeks of Aqua Therapy on Back Pain, Body Composi- ton and Motor Functon of Inactve Elderly Women 1. Department of Sports Sciences, University of Maragheh, Maragheh, Iran. *Solmaz Babaei Bonab 1 Background and Aims Aging is along with muscle weakness and musculoskeletal pain that requires aten- ton and planning to control these changes. The purpose of this study was to investgate the efect of eight weeks of aqua therapy on back pain, body compositon, and motor functon in inactve elderly women. Methods The present study was quasi-experimental with a pre-test and post-test design of a suitable type. Thirty inactve elderly women were voluntarily and randomly assigned to two experimental and control groups. The experimental group performed combined water exercises for eight weeks, three sessions a week with a maximum intensity of 45 to 65% of the maximum heart rate. Body compositon variables were analyzed using body compositon analysis device, back pain analyzed by Key Star Back 9-item ques- tonnaires, and movement control variables such as walking speed evaluated using 10 m walking test and the ability to maintain balance analyzed with stand-up and tme test, tested before and afer the training protocol. And the data were analyzed using the SPSS program and independent and dependent t-test. Results Based on the fndings of the present study, signifcant improvement in body compositon, in- cluding weight, fat percentage, muscle tssue, and waist to hip rato, was observed in elderly women (P=0.001), and the results of the present study showed factors afectng motor control had a signifcant improvement, such as balance (P=0.001), speed (P=0.001) and physical back pain (P=0.001) and mental back pain (P=0.001) afer eight weeks practcing in the water. Conclusion This study showed that as the elderly live a passive and actve life, their physical health im- proves. To increase the range of moton of the lumbar region, stabilize the trunk, and reduce back pain, trainers and ofcials can use this non-invasive and low-cost method in the training program and rehabili- taton of the elderly individual. A B S T R A C T Keywords: Back pain, Body compositon, Aqua therapy, Elderly wom- en, Motor functon Received: 19 Jan 2020 Accepted: 21 Jul 2020 Available Online: 01 Sep 2021 Citaton Babaei Bonab S. The Efect of Eight Weeks of Aqua Therapy on Back Pain, Body Compositon and Motor Functon of Inactve Elderly Women. Scientfc Journal of Rehabilitaton Medicine. 2021; 10(4):836-847. htps://doi.org/10.32598/sjrm.10.4.17 https://doi.org/10.32598/sjrm.10.4.17 Use your device to scan and read the artcle online I