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Metabolic and respiratory responses during the performance of a one-hour man test 4.

Authors
Sinkule-E; Turner-N; Eschenbacher-W
Source
J Int Soc Respir Prot 2002 Spring/Summer; 19(1-2):49-57
NIOSHTIC No.
20022531
Abstract
Human physiological variables, such as body weight, height, strength, and aerobic capacity, can affect the results of such exercise tests as that used for Man Test 4 (MT4), a NIOSH respirator certification test described in 42 C.F.R. Part 84 (1999). The purposes of this research were to characterize the metabolic responses of men with varying body weights performing a one-hour MT4 and to compare these results to Kamon's earlier steady-state testing results (Kamon, et al., 1975). Fourteen male volunteers performed MT4 for one hour while they wore a portable, telemetric metabolic measurement device weighing 0.6 kg. Human physiological variables, such as body weight, height, strength, and aerobic capacity, can affect the results of such exercise tests as that used for Man Test 4 (MT4), a NIOSH respirator certification test described in 42 C.F.R. Part 84 (1999). The purposes of this research were to characterize the metabolic responses of men with varying body weights performing a one-hour MT4 and to compare these results to Kamon's earlier steady-state testing results (Kamon, et al., 1975). Fourteen male volunteers performed MT4 for one hour while they wore a portable, telemetric metabolic measurement device weighing 0.6 kg. The subjects were stratified into four body weight categories: 80 - 86 kg (n=4); 86.1 - 92 kg (n=4); 92.1 - 100 kg (n=4); and >100 kg (n=2). Heart rate (HR), minute ventilation (VE), oxygen consumption (VO2), carbon dioxide production (VCO2), and respiratory quotient (RQ) were measured for every breath and averaged for each minute of each task. Mean MT4 VO2 was significantly greater for the 86 - 92 kg (1.41 L/min), 92 - 100 kg (1.53 L/min), and >100kg (1.70 L/min) groups than for the 80 - 86 kg group (1.06 L/min, p<0.05). Mean MT4 VCO2 was significantly greater for the 92 - 100 kg/1.40 L/min) and >100 kg (1.41 L/min) groups than for the 80 - 86 kg group (1.07 L/min, p<0.05). Mean MT4 VE and RQ for the >100 kg group were significantly greater than for the 80 - 86 kg group (p<0.05). Mean MT4 HR for the two lowest body weight groups was significantly lower than that of the >100 kg group (p<0.05). For all MT4 tasks except the Overcast and Sample periods, VO2 was lower than that reported in previous research (Kamon, et al., 1975). These differences are the result of the absence of steady-state conditions in the current study.
Keywords
Respirators; Respiratory-protection; Metabolic-rate; Metabolic-study; Performance-capability; Personal-protective-equipment; Perspiration; Physical-exercise; Physical-fitness; Physiological-measurements; Physiological-response; Anthropometry; Self-contained-breathing-apparatus
Contact
National Institute for Occupational Safety and Health, Division of Respiratory Disease Studies,1095 Willowdale Road, Morgantown, West Virginia 26505, USA
Publication Date
20020301
Document Type
Journal Article
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Issue of Publication
1-2
ISSN
0892-6298
NIOSH Division
DRDS; DSHEFS; NPPTL
Priority Area
Research Tools and Approaches: Control Technology & Personal Protective Equipment
Source Name
Journal of the International Society for Respiratory Protection
State
WV; OH; PA
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