الفهرس 
Effect of deep breathing onfunctional capacity among healthcare workers wearing FFP2/N95 filtering facepiece
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Abstract
Background: The novel 2019 coronavirus disease (COVID-19) pandemic is putting the world at risk due to the spread of virus-infected respiration droplets. healthcare workers (HCWs) wear N95 respirators to avoid this infection but Wearing it invokes several physiologic implications with prolonged use. Aim of the study: the aim of this study was to measure the effect of deep breathing on functional capacity among healthcare workers wearing FFP2/N95 filtering facepiece respirators. Methods: Sixty HCWs (14 men and 46 women) wearing FFP2/N95 filtering facepiece respirators participated their age ranged from (25-35) years old, participants were recruited from intensive care unit department and inpatient clinics, Cairo University Hospitals. participants were assigned into two groups equal in number; the group (A) (22 women& 8 men) performed deep breathing training by incentive spirometer (IS) daily for 6 weeks, while the group (B) (24 women& 6 men) was the control group. Both groups were wearing the respirator for 4-8 h/day Results: after 6 weeks period, there was no significant difference between groups in HR, O2 saturation and 6MWD at pretraining without mask and at pretrainingwith mask (p > 0.05). However, there was a significant decrease in resting HR and HR after 6MWT at post training with mask of study group compared with that of control group (p < 0.001). There was a significant increase in resting O2 saturation, O2 saturation after 6MWT and 6MWD at post training with mask of study group compared with that of control group (p < 0.01). There was a significant decrease in resting MBS and MBS after 6MWT at post training with mask of study group compared with that of control group (p < 0.001). There was a significant increase in the BHT of study group compared with that of control group post training (p < 0.001)