en فيزيولوژی ورزشی و شاخه‌های وابسته بدان Sport Physiology and its related branches مقاله اصیل Original Article <div style="text-align: justify;"><strong>Background. </strong>Considering that breathing strategies are essential for athletic performance, insufficient scientific data exists to understand how they operate.<br> <strong>Objectives.</strong> This study investigated the effect of conscious diaphragm muscle-based respiratory muscle exercise on respiratory muscle strength and function.<br> <strong>Methods. </strong>For that, four groups (IMT-DF (inspiratory muscle training using diaphragm), IMT (inspiratory muscle training), IMT-SHAM (training without intensity), and control) were formed into which 24 healthy sedentary participants were randomly divided. Inspiratory muscle training was organized three days a week for 4 weeks, and respiratory muscle strength (measured with a pressure gauge) and function (measured with a spirometer) were obtained one day before and one day after the 4 weeks. In respiratory muscle strength parameters maximal inspiratory pressure and maximal expiratory pressure (MIP-MEP), significant differences were found in favor of IMT-DF and IMT groups.<br> <strong>Results.</strong> Significance was found favoring IMT-DF in analyzing the difference between means and percentage change in comparing pre-post test data between groups. In the pulmonary function tests, a significant difference was found between the IMT-DF group and the IMT group in favor of the IMT-DF group in the forced expiratory volume in the first second (FEV1) parameter; a significant difference was found between the IMT-SHAM group and the IMT-DF group in favor of the IMT-SHAM group, and no significant difference was detected in respiratory functions (p>0.05).<br> <strong>Conclusion.</strong> As a result, performing respiratory muscle training specific to the diaphragm muscle may improve respiratory muscle strength and function more positively than regular training.</div> Diaphragm, Respiratory, Exercise, Maximal Inspiratory Pressure, Maximal Expiratory Pressure, FEV1 0 0 http://aassjournal.com/browse.php?a_code=A-11-2299-1&slc_lang=en&sid=1 Mehmet Vural mehmetvrl27@hotmail.com 100319475328460014959 100319475328460014959 No Coaching Education Department, Faculty of Sport Science, Gaziantep University, Gaziantep, Turkey. Mustafa Ozdal ozdalm@hotmail.com 100319475328460014960 100319475328460014960 No Coaching Education Department, Faculty of Sport Science, Gaziantep University, Gaziantep, Turkey. Mete Berk Demiryol demiryolmete@gmail.com 100319475328460014961 100319475328460014961 Yes Sport Management Department, Faculty of Sport Science, Gaziantep University, Gaziantep, Turkey. Cemre Didem Eyipinar cemreeyipinar@gantep.edu.tr 100319475328460014962 100319475328460014962 No Physical Education and Sports Teaching Department, Faculty of Sport Science, Gaziantep University, Gaziantep, Turkey.