Effect of 4 week expiratory muscle strengthening on exercise induced breathlessness in normal adults-a pilot study
Background: During exercising, the expiratory phase plays an equally important role in improving the endurance as it helps in reducing the exercise-induced breathlessness, therefore this study aims at specifically strengthening the expiratory muscles so as to study the effect of expiratory muscle strengthening on exercise-induced breathlessness
Aims and objectives: To evaluate the effect of 4 weeks of expiratory muscle strengthening on exercise-induced breathlessness in normal individuals.
Methodology: The clearance from the ethical committee was obtained. Subjects were then screened on the basis of inclusion and exclusion criteria . 13 Eligible subjects were then enrolled for the study. Written consent was obtained from the subjects before conducting the study. A pilot study was carried out on a total of 13 subjects ranging in the age group of 20-35yrs, where pre-intervention the Maximum Expiratory Pressure (MEP) and 1.5mile walk distance was calculated after which the subjects underwent a 4 week intervention protocol using Expiratory Muscle Strength Trainer 150 ( EMST-150) where the subjects performed 25 training breaths in one session where there were a total of 5 sessions in a day, 5days/week for a total of 4 weeks. Post the intervention the MEP and 1.5mile walk values were recalculated and compared to check for the difference.
Result: AÂ total of 13Â patients were analyzed for outcome MEP and 1.5mile walk test. Data were analyzed in terms of the mean difference. Statistically, a significant change was seen in the MEP and 1.5-mile walk test values post-intervention, i.e at the end of 4 weeks, where the values obtained were, MEP: pre - 77.537 ±13.67 and post-88.063 ±18.39 with a p-value of 0.0019, 1.5-mile walk(vo2max.): pre -35.810 ±14.56 and post â€“ 39.810 Â±11.8 with a p-value of 0.0038 and RPE: pre â€“ 3.80 Â±0.5 and post â€“ 1.7 ±0.5 with a p-value of 0.0057, thereby proving a statically significant improvement in the outcome measures.
Conclusion: The study concludes that Expiratory muscle strengthening improves the maximum expiratory strength thereby reducing the exercise-induced breathlessness leading to an improvement in the endurance level.
Copyright (c) 2019 Akshata Ashok Changwani, Abhijit Diliprao Diwate, Arijit Kumar Das
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