Exercise performance while wearing a tight-fitting powered air purifying respirator with limited flow.
Sixteen subjects exercised at 80-85% of maximal aerobic capacity on a treadmill while wearing a tight-fitting, FRM40-Turbo Powered Air Purifying Respirator (PAPR). The PAPR was powered by a DC power supply to give flow rates of 0%, 30%, 66%, 94%, and 100% of rated maximum blower capacity of 110 L/min. As flow rate was reduced, so was performance time. There was a 20% reduction in performance time as blower flow changed from 100% to 0% of maximum. Significant differences in breathing apparatus comfort and facial thermal comfort were found as flow rate varied. It was concluded that inadequate blower flow rate decreases performance time, facial cooling, and respirator comfort.
Johnson
Arthur T
AT
Biological Resources Engineering, University of Maryland, College Park, MD 20742, USA. aj16@umail.umd.edu
Mackey
Kathryn R
KR
Scott
William H
WH
Koh
Frank C
FC
Chiou
Ken Y H
KY
Phelps
Stephanie J
SJ
D000293:Adolescent; D000328:Adult; D001833:Body Temperature Regulation; D004867:Equipment Design; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D010807:Physical Endurance; D012134:Respiratory Protective Devices; D013696:Temperature