Efficacy of Rapid Inspiratory Bouts Followed by Sustained Expiration on Maximal Force Generation During Isometric Exercise

Introduction: Isometric is a static type of exercise in which the strength of muscle is increased due to an increase in tension in the muscle fibres, but many health professionals are against the use of isometrics due toits adverse effect on the cardiovascular system.Objective: The objective of the current research is to examine the impact of rapid inspiratory bouts followed by sustained expiration on maximal force generation during isometrics.Methodology: Forty patients with lower limb weakness performed rapid inspiratory bouts followed by sustained expiration while performing isometrics of the quadriceps and hamstrings muscle group. The strengthof patients was measured by a hydraulic hand dynamometer. This study assessed pre- and post-isometric results. In the pre-session, participants were asked to do 10 repetitions of isometrics of the quadriceps andhamstring muscle group according to their own method. Then after 10 minutes, they were taught to take several gulps of inspiration and to expire in a controlled way while exerting force on a dynamometer. The mean of all repetitions was calculated.Results: On comparing the two sessions, the maximal force generation was increased in the quadriceps muscle group (p < 0.001) and hamstrings (p < 0.001) while doing isometrics with the use of rapid inspiratory bouts followed by sustained expiration while doing isometrics.Conclusion: Therefore the study concludes that taking rapid inspiratory bouts followed by sustained expiration has a significant effect on the strength of muscles. How to cite this article:Shinde A, Nikam P. Efficacy of Rapid InspiratoryBouts Followed by Sustained Expiration onMaximal Force Generation During IsometricExercise. Chettinad Health City Med J.2024;13(3):55-58. DOI: https://doi.org/10.24321/2278.2044.202445