MARC 主機 00000nam 2200000 a 4500
001 AAI1492014
005 20111219143119.5
008 111219s2011 ||||||||s|||||||| ||eng d
020 9781124624976
035 (UMI)AAI1492014
040 UMI|cUMI
100 1 McKenzie, Amy L
245 10 Physiological and perceived effects of head cooling during
simulated firefighting activity|h[electronic resource]
300 209 p
500 Source: Masters Abstracts International, Volume: 49-05,
page: 3155
500 Adviser: Susan W. Yeargin
502 Thesis (M.S.)--Indiana State University, 2011
520 Accessory cooling devices have been developed to protect
firefighters (FF) from suffering an exertional heat
illness by attenuating the rise in core body temperature.
Head cooling (HC) via a cold gel pack placed inside the
helmet is one cooling mechanism marketed to FF, but the
research regarding its efficacy is limited
520 PURPOSE: To investigate the physiological and perceived
effects of HC during simulated firefighting activity (FFA)
520 METHODS: Participants (males; 40+/-8 y; 168+/-7 cm; 91.8+/
-14.2 kg) were randomly assigned to either the HC group
(n=9), who completed FFA while wearing a cold gel pack
inside their helmet, or the control (CON) group (n=10),
who received no accessory cooling during FFA. FF completed
four FFA stations in full turnout gear and self-contained
breathing apparatus (SCBA) (23.3+/-1.4 kg). FFA stations
lasted 15 min and included an obstacle course, a high-rise
drill, a two-story search and rescue drill, and car
extrication. Stations were completed in random order.
After each station, FF replaced their air cylinder and HC
replaced their gel pack; FF then completed a different
station. After every two stations, the FF rested for 15
min in the shade by removing their turnout gear and SCBA
and drinking water ad libitum. Gastrointestinal
temperature (GI), heart rate (HR), Stroop Test
interference score (ST), rating of perceived exertion
(RPE), perceived thermal strain (PTS), and hydration
status were measured. Repeated-measures ANOVAs were used
to compare groups across time
520 RESULTS: No significant demographic differences were
found between groups (p>0.05). GI (39.18+/-0.49°C) and
HR (163+/-22bpm) increased during FFA. No significant
interactions were found for GI, HR, ST, PTS, or RPE (p>
0.05). There were no differences in sweat loss (2.5+/-0.8
L), hypohydration (0.9+/-0.8%), or post FFA urine specific
gravity (1.020+/-0.008) between groups (p>0.05). Weak
relationships were noted between perceived thermal
sensation and gastrointestinal temperature (r=.248)
520 CONCLUSION: HC did not attenuate the rise in GI or reduce
HR during FFA. The discrepancy between perception and
actual body temperature may be dangerous for FF, as it may
allow them to work beyond their central drive and the
critical GI threshold
590 School code: 0094
650 4 Health Sciences, Occupational Health and Safety
650 4 Health Sciences, General
650 4 Biology, Physiology
690 0354
690 0566
690 0719
710 2 Indiana State University.|bAthletic Training
773 0 |tMasters Abstracts International|g49-05
856 40 |uhttps://pqdd.sinica.edu.tw/twdaoapp/servlet/
advanced?query=1492014
912 PQDT
