effects of physical load using the treadmill on respiratory muscle fatigue in terms of the immediate response to respiratory muscle strength

The research aims to identify the effect of a physical load using the treadmill on respiratory muscle fatigue in terms of the instantaneous response to the strength of the respiratory muscles Effort? the descriptive approach was used for its suitability to the nature of the current research, where the sample consisted of (9) athletes practicing arena and field effectiveness. If they are characterized by good health and high athletic performance, and they are not smokers, the strength of the inspiratory and expiratory muscles was measured before the effort during the rest period and immediately after the effort. Significant differences in the expiratory muscle strength variable (EMS) with the probability value (0.008) in the expiratory muscle strength variable, the researcher concluded that the physical load using the treadmill would affect the values of muscle Expiratory muscle strength (EMS) does not increase inspiratory muscle strength (IMS).Keywords: (respiratory muscle fatigue, inspiratory muscle strength, expiratory muscle strength.)