Abstract

Background:
In India, obesity is rapidly growing health concern across all age groups. Obesity has significant effects on pulmonary function. The peak expiratory flow rate (PEFR) demonstrates the caliber of the airways and is widely recognized as an objective indicator of respiratory efficiency. This indicator is useful for the diagnosis and management of respiratory disorders.

Aim:
This study aimed to determine the relationship between BMI and immediate post-exercise changes in PEFR among medical undergraduate students.

Methods:
A cross-sectional study was conducted among 120 healthy undergraduate medical college students. Baseline anthropometric data, including height and weight, were collected for assessment of BMI. BMI was calculated using the Quetelet index. PEFR was measured using a Wright Peak Flow Meter. PEFR Measurements were taken before and after performing a 5-min moderate-intensity Harvard Step Test by participants.

Results:
The results showed that individuals with a normal BMI had the highest mean increase in PEFR (mean difference: 27.85 ± 7.97, p< 0.0001), followed by the overweight group (mean difference: 15.23 ± 12.04, p < 0.0001). The obese group exhibited the least improvement (mean difference: 5.49 ± 11.82, p < 0.0001). The P values in all three groups for PEFR before and after exercise were low (

Key words: Peak Expiratory Flow Rate ,Body Mass Index (BMI),Harvard step Exercise,obesity