Effects of Functional Inspiratory Muscle Training Based on Core Stability Exercise on Respiratory Functions and Physical Performance in Football Players

Abstract – Tütüneken, YE, Kardes, K, Kabasakal, E, Çakir, EN, Kalay, AC, Tetik, G, and Deliktaş, ES. Effects of functional inspiratory muscle training based on core stability exercise on respiratory functions and physical performance in football players. J Strength Cond Res 40(6): 702–708, 2026—Inspiratory muscle training is recognized as a potential strategy to enhance performance. This study compares the effects of a program that incorporates Functional Inspiratory Muscle Training (FIMT) based on Core Stability Exercise with Core Stability Training (CST) in football players. Thirty subjects were randomly assigned to either the FIMT group or the CST group. Both programs were conducted over 6 weeks, with five 45-minute sessions each week, alongside regular training routines. Outcomes measured included respiratory muscle strength, pulmonary function tests, the Biering-Sorensen Test (BST), the Anterior Plank Test (APT), and the Y-Balance Test (YBT). Results indicated statistically significant improvements in the FIMT group for maximal inspiratory pressure, maximal expiratory pressure, forced vital capacity, and FEV₁ values (p < 0.05). However, there were no significant differences between the groups in BST, APT, and YBT results (p > 0.05). Overall, FIMT proved more effective than CST in enhancing respiratory muscle strength and lung volumes in football players, while both methods similarly affected trunk muscular endurance and dynamic balance.