What question did this study set out to answer?

To determine the impact of Ramadan fasting on expiratory flow rates and related variables in healthy individuals.

April 13, 2026Saudi Medical JournalOpen Access

Does Ramadan fasting affect expiratory flow rates in healthy subjects?

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Longitudinal study examines expiratory flow rates during Ramadan fasting in healthy individuals, indicating no significant changes.

To determine the impact of Ramadan fasting on expiratory flow rates and related variables in healthy individuals.
Unmatched case-control longitudinal study design
46 non-smoking healthy subjects
Lung function testing conducted across three Islamic months
Measurements of expiratory flow rates and body mass were taken
Significant reduction in body mass observed during Ramadan compared to pre and post Ramadan
No significant changes in expiratory flow rates during Ramadan
FEF75 and FEF75-85 increased significantly in the post Ramadan period
Negative correlation between changes in FEF75 and changes in body mass

Siddiqui et al. (2006) studied this question.

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