Fatemeh Khodadadi-Mian Abadi - Msc of Exercise Physiology, Department of Exercise Physiology, Faculty of Physical Education and Sport Science, University of Shahrood, Semnan, Iran.
Ali younesian - Associate Professor of Exercise Physiology, Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Shahrood University of Technology, Semnan, Iran
Ali Livani - Ph.D. student of Exercise Physiology, Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran

Purpose: The aim of this research was the effect of ۴ weeks of interval training and Inspiratory Muscle Training (IMT) on the initial recovery of respiratory muscle strength in inactive people. Method: This research was semi-experimental. The statistical sample of this research consisted of ۳۰ healthy and inactive students of Shahrood University of Technology with an average age of ۳۰±۱۰ years. Subjects were randomly divided into ۳ groups (IMT, Interval and Sham exercises). The parametric test of one-way analysis of variance with repeated measurement and dependent t-test with ۹۵% confidence was used with SPSS ۲۶ softwar. Results: Inspiratory muscle strength showed a significant increase in IMT and interval training groups (P<۰.۰۵). Also, the time to return to the initial state of respiratory muscle strength decreased significantly in all three groups (P>۰.۰۵), the largest decrease was related to the IMT and sham exercise groups, and the interval exercise group experienced a smaller decrease than the other two groups.‎ Conclusions: It seems that IMT training is more effective than interval training in increasing the strength of respiratory muscles and improving the return to the initial state of the strength of these muscles.‎

Interval training, recovery, respiratory muscle strength, inactive