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In diagnosis and treatment of respiratory diseases, the assessment of lung functions is of considerable importance (1) . The Peak Expiratory flow Rate (PEFR) is a simple, reproducible & easily affordable test of lung function. Standard or Reference PEFR, hence forth called as Reference PEFR values for an individual subject depends upon his / her gender, height, weight, ethnicity & smoking status (2) , are obtained with the help of specific formulae’s or with the help of nomograms. An Individual subject has a PEFR, determined with the help of peak flow meter, the Cipla Breathometer (3) being the most studied one. The PEFR of an individual subject varies with the reference value. A higher deviation is often seen in those with respiratory illness, which is used for diagnosis or treatment of Respiratory Illness. The said deviation is also seen in subjects without history of any Respiratory or related Illness. This cross sectional study was conducted to measure the PEFR values and an attempt has been made to find out the correlation between PEFR values and dynamic anthropometric parameter such as Chest expansion & Physical activity.

Effect of Physical Activity on PEFR in Apparently Normal & Healthy Subjects, a cross sectional analytical study