en آسیب شناسی ورزشی و حرکات اصلاحی Sport injury and corrective exercises پژوهشي Research <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Tahoma;"><span style="line-height:2;"><b>Purpose:</b> Shoulder impingement syndrome (SIS) is the most prevalent issue among shoulder disorders. Given the promising outcomes of aquatic physiotherapy in rehabilitation, this study aimed to evaluate the impact of an 8-week aquatic training program on pain, range of motion, and electrical activity in the shoulder of pre-elderly patients suffering from SIS.<br> <b>Methods:</b> 30 men of military retirees aged 60 years and older, were voluntarily recruited and then randomly assigned into experimental and control groups. The experimental group participated in an eight-week program of aquatic training. Pain, range of motion, and shoulder muscle activity were investigated using a Visual Analog Scale (VAS), electrogoniometer, and electromyography, respectively&mdash;twice as pre and post-test.<br> <b>Results:</b> Results showed significant differences between groups in pain scale, shoulder external and internal rotation (P < 0.001), shoulder abduction (P = 0.002) and muscle electrical activity of <span style="background:white"><span style="color:black">serratus&nbsp;anterior (P</span></span> < 0.001), but not in shoulder flexion (P = 0.082) and muscle activity of upper trapezius (P = 0.075).<br> <b>Conclusions:</b> Our aquatic training program may profoundly impact regaining shoulder range of motion and recovery from shoulder pain in patients with SIS. Further research is warranted to assess a different and more specialized aquatic program to properly affect shoulder flexion and trapezius muscle function, which were not improved by the present intervention.</span></span></span></div> Shoulder impingement syndrome, Hydrotherapy, Electromyography, Pain, Range of motion 0 0 http://ptj.uswr.ac.ir/browse.php?a_code=A-10-28-2&slc_lang=en&sid=1 Manijeh Soleimanifar manijeh.soleimanifar@yahoo.com Yes Lifestyle Medicine Department, Medical Laser Research Center, ACECR, Tehran, Iran. Mostafa Sarabzadeh sarab68@yahoo.com No National Elites Foundation, Tehran, Iran Mehdi Pakdel ptchampion3463@gmail.com No MSc of physiotherapy, Tehran, Iran. Zahra Asadi Zasadi@ajaums.ac.ir No Department of Community Medicine. School of Medicine, AJA University of Medical Sciences, Tehran, Iran.