EFFECT OF RECUMBENT BODY POSTURE ON DYNAMIC LUNG FUNCTION IN YOUNG HEALTHY NON OBESE SUBJECTS

Sleeping position affects upper airway morphology, which in turn may affect respiratory function. Postural changes in lung volume, in the transverse plane in the healthy individuals are not well documented. The purpose of the present study is to assess the effect of recumbent body posture in relation to head position on dynamic lung function in healthy non obese subjects. This study was carried out on 21 male healthy subjects with age of 19.4 ± 1.2 years (Mean ± SD) and mean body mass index of 21.45 ± 2.37 Kg/M2. Dynamic lung function tests was performed in six recumbent positions, (1)Supine with head straight (SUPHS) (2)Supine with head rotated to the right (SUPHR) (3) Supine with head rotated to the left (SUPHL) (4) Right lateral recumbent body position (5) Left lateral recumbent body position (6) Prone position. We observed a significant increase in mean PIF (p