Correlation between Forward Head Posture and Peak Expiratory Flow Rate in Undergraduate Students using Peak Flow Meter: A Correlational Study

Background: Forward head posture (FHP) is a prevalent postural deviation associated with cervical spine strain, musculoskeletal disorders and compromised respiratory mechanics. Among undergraduate students, prolonged study sessions and sedentary behaviors may exacerbate FHP, potentially affecting respiratory function. Objectives: This study aims to explore the correlation between FHP, measured using craniovertebral angle (CVA), and peak expiratory flow rate (PEFR), a critical indicator of pulmonary function. Methods: An observational study was conducted on 100 undergraduate students ages 18-25 years. FHP was quantified via CVA measured using Kinovea software, while PEFR was recorded using a Mini-Wright peak flow meter. Participants performed three PEFR tests, and the highest reading was used for analysis. Pearson correlation coefficient and p-values were calculated to assess the relationship between FHP and PEFR. Results: The correlation coefficient (r=0.156, p=0.12) indicated a weak positive relationship between FHP and PEFR, though not statistically significant. Variability in PEFR results was attributed to factors such as circadian rhythms, physical fitness and stress levels, which were not controlled during the study. Conclusion: Although the study revealed a weak positive correlation between FHP and PEFR, it underscores the importance of addressing postural deviations in improving respiratory function. Further research involving larger sample sizes and controlled variables is warranted to validate these findings and evaluate the impact of postural correction interventions on pulmonary health.