International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Volume 8 Issue 5
September-October 2026

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Correlation between Peak Expiratory Flow Rate (PEFR) and Exercise-Induced Breathlessness (EIB) in Normal Young Adults

Author(s) Miss Aditi Gajanan Deshmukh, Dr. Reshma Nipunge
Country India
Abstract Background: Peak Expiratory Flow Rate (PEFR) is a fundamental measure of lung function and airway caliber. Physical exercise induces respiratory dynamic changes that can cause transient bronchoconstriction in susceptible individuals. Assessing PEFR changes before and after exercise provides key insights into respiratory physiological adaptations and early markers of exercise-induced bronchoconstriction.
Objective: To determine the effect of physical exercise on Peak Expiratory Flow Rate (PEFR) and evaluate the percentage reduction in PEFR post-exercise among students.
Methodology: An experimental pre-test and post-test study was conducted on 200 participants aged 18–25 years. Baseline assessments of age, height, weight, BMI, and pre-exercise PEFR were recorded. Participants performed a standardized exercise protocol, followed by post-exercise PEFR measurements. The percentage fall in PEFR was calculated for each participant. Data were analyzed using paired sample t-tests and descriptive statistics.
Results: A total of 200 participants completed the assessment. Pre-exercise mean PEFR was 496.08 ± 76.87 L/min, which decreased significantly post-exercise to 435.62 ± 77.40 L/min (p < 0.001), representing a mean reduction of 60.47 L/min and a mean percentage fall of 12.28 ± 6.43%. Furthermore, 40.0% (n = 80) of participants exhibited a PEFR fall ≥ 15%.
Conclusion: Physical exercise induces a statistically significant reduction in PEFR. Routine screening of pre- and post-exercise PEFR can help identify individuals with hyper-reactive airways and guide early prophylactic interventions.
Keywords Peak Expiratory Flow Rate, PEFR, Exercise-Induced Bronchoconstriction, Respiratory Function, Physiotherapy Students
Field Medical / Pharmacy
Published In Volume 8, Issue 5, September-October 2026
Published On 2026-09-20
DOI https://doi.org/10.36948/ijfmr.2026.v08i05.87989
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CrossRef DOI prefix of IJFMR is 10.36948/ijfmr

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